A gain-controlled amplifier is provided having a broad range of gain control which is traversed by varying the collector impedance of a common emitter coupled amplifying transistor. The collector load impedance of the transistor includes a controlled resistance device having a base electrode coupled to...
I assume that you use a BJT in common emitter, like in Wikipedia, figure 2. Any resistor (or complex impedance) between VoutVout and the ground would tend to bypass the transistor and VEVE. An exceptionally low resistor, imagine a wire, will bypass it entirely. A larger one will have le...
摘要：A common-emitter amplifier having its dynamic voltage gain controlled by using a controlled emitter-follower to shunt the emitter impedance of the common emitter amplifier.申请人：SPERRY CORPORATION 代理人：Douglas L. Tschida,Kenneth T. Grace,William E. Cleaver 更多信息请下载全文后查看 ...
A gain-controlled amplifier comprises first and second transistors connected in common-emitter configuration, third and fourth transistors connected in common-emitter configuration, a driver circuit responsive to application of an input signal thereto to vary the common- emitter current of the first and...
An input microphone 30 applies incoming audio signals to the base electrode of a common emitter amplifier section 31 via a coupling capacitor 32. The common emitter amplifier 31 has a collector electrode coupled to a hearing aid battery 33 which may be a 1.5 volt miniature type. The collector...
The collector-emitter paths of the transistors are connec... ML Marmet,CW Padgett 被引量: 10发表: 1980年 Low power & high gain differential amplifier using 16 nm FinFET A low noise, two-stage differential operational amplifiers are designed in 16nm FinFET technology are presented. The ...
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
Power source circuit controls the gain of the non-inversion amplifier circuit. Load circuit (340) controls the gain of each of the inversion and non-inversion amplifier circuits, where output signals from the amplifier circuits are output via a common output signal terminal....
A transistorized voltage-controlled variable-gain audio amplifier including a transistor connected as a common-emitter amplifier, and a control circuit coupled to the emitter of the amplifying transistor and operative in response to a direct control signal to vary the impedance at the emitter without...
摘要：A gain-controlled amplifier amplifies with reduced distortion an input signal at a gain which varies exponentially in accordance with a control voltage, and has a wide dynamic range irrespectively of the value of the control voltage. The gain-controlled amplifier comprises first and second ...