• Common Emitter - Characteristics - Bandwidth | Technology ...

    Current gain in the common emitter circuit is obtained from the base and the collector circuit currents. Because a very small change in base current produces a large change in collector current, the current gain (β) is always greater than unity for the common-emitter circuit, a typical value is about 50.

  • Optocoupler Applications

    4 As judged from expression (1), the turn-off time toff is affected by collector-base capacitance CC-B, D.C. current amplification factor hFE, and load resistance LR.In actual circuit design, CC-B and hFE are fixed. Accordingly, the turn-off time is significantly affected by the resistance of load RL. Graph 1 shows the relationship between response speed (ton,toff) and load resistance (RL) in ...

  • Repeater-Builder Project Information Index

    A Current-Sensing Fan Controller by Willie Barnett N1NKM This circuit is installed inside a linear power supply and adjusts the fan speed based on the current that's being drawn by the radio, so the fan runs faster when the radio is transmitting. Several alternate (and untested) designs are also provided.

  • How to Calculate the Collector Current, Ic, of a Transistor

    The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor. And it all depends on what information is already known about the transistor: 1st Way to Calculate Collector Current …

  • collector current in a current repeater circuit – Crane ...

    The repeater includes a transistor, the collector-emitter circuit of which is connected to the collector of the first transistor. The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor.

  • (a) For given transistor circuit, the base current is ...

    Jan 26, 2020· (a) For given transistor circuit, the base current is `10muA` and the collector current is 5.2 mA. Can this transistor circuit be used as an amplifier. Your ...

  • (PDF) EC 2257 ELECTRONICS CIRCUITS II AND SIMULATION …

    ec 2257 electronics circuits ii and simulation lab 1. current series feedback amplifier 2. voltage shunt feedback amplifier 3. rc phase shift oscillator simulation using pspice. download. related papers. ec2258-lab manual. by soundraraj maheswari. gate solved paper …

  • US4473794A - Current repeater - Google Patents

    A current repeater circuit (FIG. 8) is employed generally throughout the integrated circuit amplifier for driving various elements. The current repeater comprises at least one unipolar transistor to permit operation at low direct current voltages, while providing an accurately controlled current transfer ratio.

  • Understanding common emitter ... - All About Circuits

    Dec 08, 2020· That circuit won't work in practice since the collector current of Q1 as determined by R1, R2, and Re, must exactly match the current as generated by the current …

  • Collector current of PNP transistor Calculator | Calculate ...

    To use this online calculator for Collector current of PNP transistor, enter Saturation current (Is), Voltage across emitter-base junction (VEB) and Thermal voltage (Vt) and hit the calculate button. Here is how the Collector current of PNP transistor calculation can be explained with given input values -> 3.991E+31 = 0.01*e^ (2/0.02585).

  • 250+ TOP MCQs on Operational Amplifier Internal Circuit ...

    Clarification: In current repeater, the current I C = I C1 =I C2 =⋯= I C N ≅ I ref. Where, N – Number of transistors used in current repeater circuit. 6. If the reference and collector current are 0.539mA and 0.49mA respectively, how many transistors are used in current repeater circuit? (Assume β =150) A. 11 B. 14 C. 10 D. 8. Answer: B

  • Collector current when emitter current is given Calculator ...

    In this formula, Collector current uses Common-base current gain and Emitter current. We can use 10 other way(s) to calculate the same, which is/are as follows - collector_current = Saturation current *e^(Voltage across the base–emitter junction / Thermal voltage) base_current_1 = Collector current / Common emitter current gain

  • Chapter 11: The Current Mirror [Analog Devices Wiki]

    The implementation of the current mirror circuit may seem simple but there is a lot going on. The simple two transistor implementation of the current mirror is based on the fundamental relationship that two equal size transistors at the same temperature with the same V GS for a MOS or V BE for a BJT have the same drain or collector current. To best understand this important circuit building ...

  • collector current in a current repeater circuit – Hoist ...

    The repeater includes a transistor, the collector-emitter circuit of which is connected to the collector of the first transistor. The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor.

  • When the current gain increases from 50 to 300 in an ...

    Oct 31, 2020· When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current . a. Remains almost the same . b. Decreases by a factor of 6

  • Understanding Collector Current in ... - All About Circuits

    Nov 11, 2019· The Importance of the Current Gain of BJTs. We saw in the previous article that BJT beta is both simple and complex: simple, because all you need to do to calculate collector current is multiply base current by beta; complex, because there are several betas to choose from.The "normal" beta (β F or β DC) refers to the large-signal current gain of a bipolar junction transistor operating in ...

  • 10.3: INTEGRATED-CIRCUIT DESIGN TECHNIQUES - Engineering ...

    Aug 28, 2021· Figure 10.9 Current repeater. Many linear integrated circuits use a connection similar to that shown in Fig. 10.9, either for biasing or as a controlled current source. Assume that both transistors have identical values for saturation current (I_S) and that (beta) is high so that base currents of both transistors can be neglected.

  • Common emitter amplifier with collector current source ...

    Oct 05, 2019· Hi, I'm trying to find out the voltage gain and the input/output impedances for such a common emitter amplifier. My resulting expression is something like Av=hfe*RE/(hie+RE) hie is the base emitter resistance calculated from the formulas on paper.gm is an approximation for a collector current …

  • Index of Astron™ Power Supply Information at ...

    A VERY common cause of random current limit shutdown in linear Astron supplies is due to the manufacturing process: a bad solder joint on the collector tab of one of the 2N3771 pass transistors. During manufacture they solder the buss wire from collector to collector.

  • Is it possible to prove that the current gain for a common ...

    Yes, start with this formula: Ie = -(Ic + Ib ) where I e is the emitter current, Ic the collector current, and In the base current The current into the emitter equals the current out of the base and collector. Note in the active region, Ic = (beta...

  • Solved Problems on Transistor - Electronics Post

    Jan 09, 2020· If the emitter circuit is open, the collector current is 50 μA. Find the total collector current. Given that α = 0.92. Solution : Q6. In a common base connection, α = 0.95. The voltage drop across 2 kΩ resistance which is connected in the collector is 2V. Find the base current.

  • What is an emitter repeater (transistors, circuit analysis ...

    A Google search for "emitter repeater" immediately flooded me with offers to sell an infrared remote control repeater, presumably to extend range of a remote control device or more likely to allow a couch potato to avoid even the modest expenditur...

  • US3629692A - Current source with positive feedback current ...

    A two-terminal current-limiting or current source arrangement is coupled across a source of voltage which is subject to variations. The limiter includes a current determining resistor connected in the base-emitter circuit of a first transistor. A second transistor provides negative feedback between collector and base of the first transistor and also provides a collectoremitter circuit in ...

  • collector current in a current repeater circuit – overhead ...

    The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor. collector current in a current repeater circuit – overhead

  • Common Emitter - Characteristics - Bandwidth | Technology ...

    Current gain in the common emitter circuit is obtained from the base and the collector circuit currents. Because a very small change in base current produces a large change in collector current, the current gain (β) is always greater than unity for the common-emitter circuit, a typical value is about 50.

  • Optocoupler Applications

    4 As judged from expression (1), the turn-off time toff is affected by collector-base capacitance CC-B, D.C. current amplification factor hFE, and load resistance LR.In actual circuit design, CC-B and hFE are fixed. Accordingly, the turn-off time is significantly affected by the resistance of load RL. Graph 1 shows the relationship between response speed (ton,toff) and load resistance (RL) in ...

  • Repeater-Builder Project Information Index

    A Current-Sensing Fan Controller by Willie Barnett N1NKM This circuit is installed inside a linear power supply and adjusts the fan speed based on the current that's being drawn by the radio, so the fan runs faster when the radio is transmitting. Several alternate (and untested) designs are also provided.

  • How to Calculate the Collector Current, Ic, of a Transistor

    The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor. And it all depends on what information is already known about the transistor: 1st Way to Calculate Collector Current …

  • collector current in a current repeater circuit – Crane ...

    The repeater includes a transistor, the collector-emitter circuit of which is connected to the collector of the first transistor. The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor.

  • (a) For given transistor circuit, the base current is ...

    Jan 26, 2020· (a) For given transistor circuit, the base current is `10muA` and the collector current is 5.2 mA. Can this transistor circuit be used as an amplifier. Your ...

  • (PDF) EC 2257 ELECTRONICS CIRCUITS II AND SIMULATION …

    ec 2257 electronics circuits ii and simulation lab 1. current series feedback amplifier 2. voltage shunt feedback amplifier 3. rc phase shift oscillator simulation using pspice. download. related papers. ec2258-lab manual. by soundraraj maheswari. gate solved paper …

  • US4473794A - Current repeater - Google Patents

    A current repeater circuit (FIG. 8) is employed generally throughout the integrated circuit amplifier for driving various elements. The current repeater comprises at least one unipolar transistor to permit operation at low direct current voltages, while providing an accurately controlled current transfer ratio.

  • Understanding common emitter ... - All About Circuits

    Dec 08, 2020· That circuit won't work in practice since the collector current of Q1 as determined by R1, R2, and Re, must exactly match the current as generated by the current …

  • Collector current of PNP transistor Calculator | Calculate ...

    To use this online calculator for Collector current of PNP transistor, enter Saturation current (Is), Voltage across emitter-base junction (VEB) and Thermal voltage (Vt) and hit the calculate button. Here is how the Collector current of PNP transistor calculation can be explained with given input values -> 3.991E+31 = 0.01*e^ (2/0.02585).

  • 250+ TOP MCQs on Operational Amplifier Internal Circuit ...

    Clarification: In current repeater, the current I C = I C1 =I C2 =⋯= I C N ≅ I ref. Where, N – Number of transistors used in current repeater circuit. 6. If the reference and collector current are 0.539mA and 0.49mA respectively, how many transistors are used in current repeater circuit? (Assume β =150) A. 11 B. 14 C. 10 D. 8. Answer: B

  • Collector current when emitter current is given Calculator ...

    In this formula, Collector current uses Common-base current gain and Emitter current. We can use 10 other way(s) to calculate the same, which is/are as follows - collector_current = Saturation current *e^(Voltage across the base–emitter junction / Thermal voltage) base_current_1 = Collector current / Common emitter current gain

  • Chapter 11: The Current Mirror [Analog Devices Wiki]

    The implementation of the current mirror circuit may seem simple but there is a lot going on. The simple two transistor implementation of the current mirror is based on the fundamental relationship that two equal size transistors at the same temperature with the same V GS for a MOS or V BE for a BJT have the same drain or collector current. To best understand this important circuit building ...

  • collector current in a current repeater circuit – Hoist ...

    The repeater includes a transistor, the collector-emitter circuit of which is connected to the collector of the first transistor. The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor.

  • When the current gain increases from 50 to 300 in an ...

    Oct 31, 2020· When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current . a. Remains almost the same . b. Decreases by a factor of 6

  • Understanding Collector Current in ... - All About Circuits

    Nov 11, 2019· The Importance of the Current Gain of BJTs. We saw in the previous article that BJT beta is both simple and complex: simple, because all you need to do to calculate collector current is multiply base current by beta; complex, because there are several betas to choose from.The "normal" beta (β F or β DC) refers to the large-signal current gain of a bipolar junction transistor operating in ...

  • 10.3: INTEGRATED-CIRCUIT DESIGN TECHNIQUES - Engineering ...

    Aug 28, 2021· Figure 10.9 Current repeater. Many linear integrated circuits use a connection similar to that shown in Fig. 10.9, either for biasing or as a controlled current source. Assume that both transistors have identical values for saturation current (I_S) and that (beta) is high so that base currents of both transistors can be neglected.

  • Common emitter amplifier with collector current source ...

    Oct 05, 2019· Hi, I'm trying to find out the voltage gain and the input/output impedances for such a common emitter amplifier. My resulting expression is something like Av=hfe*RE/(hie+RE) hie is the base emitter resistance calculated from the formulas on paper.gm is an approximation for a collector current …

  • Index of Astron™ Power Supply Information at ...

    A VERY common cause of random current limit shutdown in linear Astron supplies is due to the manufacturing process: a bad solder joint on the collector tab of one of the 2N3771 pass transistors. During manufacture they solder the buss wire from collector to collector.

  • Is it possible to prove that the current gain for a common ...

    Yes, start with this formula: Ie = -(Ic + Ib ) where I e is the emitter current, Ic the collector current, and In the base current The current into the emitter equals the current out of the base and collector. Note in the active region, Ic = (beta...

  • Solved Problems on Transistor - Electronics Post

    Jan 09, 2020· If the emitter circuit is open, the collector current is 50 μA. Find the total collector current. Given that α = 0.92. Solution : Q6. In a common base connection, α = 0.95. The voltage drop across 2 kΩ resistance which is connected in the collector is 2V. Find the base current.

  • What is an emitter repeater (transistors, circuit analysis ...

    A Google search for "emitter repeater" immediately flooded me with offers to sell an infrared remote control repeater, presumably to extend range of a remote control device or more likely to allow a couch potato to avoid even the modest expenditur...

  • US3629692A - Current source with positive feedback current ...

    A two-terminal current-limiting or current source arrangement is coupled across a source of voltage which is subject to variations. The limiter includes a current determining resistor connected in the base-emitter circuit of a first transistor. A second transistor provides negative feedback between collector and base of the first transistor and also provides a collectoremitter circuit in ...

  • collector current in a current repeater circuit – overhead ...

    The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor. collector current in a current repeater circuit – overhead