Amplifiers have transformed entertainment, astronomy, search and rescue, medical diagnostics, and every human endeavour where some physical change can be converted to an electric signal.

Contrary to a long-held belief, the output resistance of the common-emitter (CE) amplifier is not independent of its signal-source resistance. Although it is widely accepted that the output resistance ...

LASER COMPONENTS offers a wide selection of both photodetectors, including single photon counters, and transimpedance amplifiers that feature noise levels down to 0.2 fA/√Hz and gain reaching up to 10 ...

This configuration of transistors is frequently used in amplifiers because the output signal is taken from across the emitter load. Common-base amplifier Another BJT amplifier configuration is the ...

In this paper, concise formulas for the intermodulation distortion of a bipolar common-emitter amplifier stage with arbitrary emitter impedance and input matching network are presented. These ...

Also, OTAs are used for precision control of amplifier gain or filter frequency with a relatively wide range. Figure 1 The operational transconductance amplifier (OTA) here is used in the bandgap ...

Besides, the current from collector to emitter starts to flow, provided the voltage VCE is applied at collector terminal. The transistor can act as a switch and an amplifier. Operating region versus ...

Q4258 and Q4268 form a fully-differential amplifier stage, with shared emitter resistance R4254, a 63.4 Ω, 1 % resistor. Resistors R4257 and R4267 connect to the –8V supply and, being much larger than ...

Unlike the common emitter amplifier this voltage increases or decreases in step with the input voltage, so the emitter follower is not an inverting amplifier. Continue reading → ...

The emitter-follower amplifier, often used in amplifier output stages, is known as a class A amplifier. The class A amplifier consists of a transistor that’s always ON.