sub.fe is the common-emitter forward current gain of the first transistor.doi:US4004243Abel Ching Nam ShengUSUS4004243 * Nov 19, 1975 Jan 18, 1977 Rca Corporation Amplifier with current gain inversely proportional to transistor hfe
The invention relates to a current amplifier having a gain factor substantially independent of the direct current gain of the common transistor emitter. CASCADE OF CMA5 AND CMA4 CURRENT MIRROR AMPLIFIERS TO COMPENSATE THE VARIATIONS OF BETA; THE OUTPUT OF THE CMA5, WHERE THE CURRENT OR GAIN TRA...
A high gain, current driven amplifier uses an emitter follower circuit with another emitter follower circuit connected in a feedback configuration to drive a common base amplifier circuit in place of a conventional cascode amplifier configuration to achieve a high frequency response with adequate signal...
A gain control amplifier includes an input differential circuit having a pair of transistors, the emitters of which are coupled via a pair of emitter resistors. The input differential circuit includes a current sink for providing an operating current. With variation of the operating current, the ga...
- 《Journal of Circuits Systems & Computers》 被引量: 3发表: 2014年 A low-noise programmable gain amplifier with fully balanced differential difference amplifier and class-AB output stage Compared with previous works, the theoretical analysis and measurement results prove that the proposed structure ...
Conceptually, an ideal current mirror is simply an ideal current amplifier with a gain of -1. In Chapter 8 we explored the transistor and you should recall that the BJT device is a current amplifier of sorts (current controlled current source) in that the collector current is β times the ...
The current re-use configuration is realized because the dc current of the frequency divider and the RF common-emitter amplifier share the same current flow path. Simulations and experiments verify that the proposed mixer offers broad band operation, miniaturization, and low power consumption. The ...
Amplifier Employing Common-mode Biasing 20 An Ideal Circuit Model of a DC Amplifier with Zero Input Voltage 21 A Non-inverting DC Amplifier with Zero Volts Output for Zero Volts Input 22 Voltage Transfer Function for a DC Amplifier with a Voltage Gain of 10 23 A DC Power Amplifier 24 ...
However, since the output of the amplifier must be a voltage, some form of high-speed voltage-mode operation must also be provided at some point. This is achieved by employing gain configurations that are inherently immune from the Miller effect, such as the common-collector and the cascode ...
Iout is now proportional to Iload, but for easy monitoring it must be level shifted to ground by the current mirror consisting of Q2 and R2. Q2's high gain forces the collector current to closely approximate the emitter current, which, applied to R2, produces a voltage that can be measur...