Amplifier Stage

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Amplifier Stage


(in Russian, kaskad usileniia), a radio-engineering device that contains an amplifier, a load circuit, and a coupling circuit to the preceding or following amplifier stage. The amplifier may be either an electronic semiconductor device, such as a transistor or tunnel diode, or an electron vacuum tube (receiving amplifier tube, klystron, or traveling-wave tube). A signal fed to the input of an amplifier stage is reproduced with amplification at the output (in the load circuit). The ratio of the output voltage, current strength, or power to the input voltage is called the voltage, current, or power gain of the stage.

According to the frequency or spectrum width of the signals amplifier stages are classified as DC, audio-frequency, intermedi-ate-frequency, or broad-band types; according to the type ofconnection of the amplifier they are classified as common-base, common-emitter, or common-collector stages for a transistorand as common-grid, common-cathode, and common-platestages for a receiving amplifier tube. Amplifiers usually have several stages, which are connected in series. This is called acascade connection—hence, the Russian name for the individual sections.


References in periodicals archive ?
This concerns in particular the last amplifier stage of PENELOPE laser system (called "100J-amplifier") to.
Furthermore, the MobileSound 3 output can be connected to a second high-power amplifier stage such as the ICEpower 50ASX2 to ensure premium audio quality for USB PC speakers, media player docking stations and active Bluetooth or WiFi connected speakers.
After amplifier stage is connected 4th order low-pass filter designed using Bessel approximation which function as anti-aliasing filter with cutoff frequency of 20000Hz.
A third module consists of an equalizer and a hi frequency tweeter plus AC power to enable a second amplifier stage for an even more thunderous sound.
The simplified driver traveling wave tube provides radio frequency (RF) amplification in the RF amplifier stage for input to the final power amplifier.
The digital output offers 78dB (typ) conversion gain, with an adjustable IF amplifier stage having 45dB of gain control range.
Enhancing LNB performance over all operating conditions and reducing production trimming requirements, the ZXNB4204 also protects the sensitive low noise amplifier stage against turn-on spikes and other fault conditions.
Due to its superior ruggedness and soft-switching behavior, TRENCHSTOP 5 enables them to attain a clean regulated rail voltage for the amplifier stage with wide input line ranges for highest audio quality and low system weight.
The configurable A/D amplifier stage consists of a 50-ohm terminated path with a bandwidth of 250MHz and a second, high-impedance path with a bandwidth greater than 125MHz.
The power amplifiers are used in conjunction with a digital processor, the STABP01, which is the controller for a buck (step-down) converter and implements the BASH supply voltage variation technique, by using a reference feedback signal derived from the power amplifier stage.
The second employs Freescale's MMG3014N as the pre-driver, the MW6S004N LDMOS FET as the driver and the MRF7P20040H as the final amplifier stage.