A shunt regulated push-pull amplifier is a
Class A amplifier
In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's efficiency, linearity and other characteristics.
Broadly, as you go up the alphabet, the am ...
whose output drivers (
transistor
A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semicondu ...
s or more commonly
vacuum tube
A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. It ...
s) operate in
antiphase. The key design element is the output stage also serves as the
phase splitter.
The acronym SRPP is also used to describe a series regulated
push-pull amplifier.
History
The earliest vacuum tubes based circuit reference is a patent by Henry Clough of the Marconi company filed in 1940. It proposes its use as a modulator, but also mentions an audio amplifier use.
Other patents mention this circuit later in a slightly modified form, but it is not widely used until 1951, when Peterson and Sinclair finally adapted and patented the SRPP for audio use. Variety of transistor based versions appeared after the 1960s.
References
{{Reflist
External links
page at tubecad.comarticle at The Valve WizardUS Patent 2802907 by Peterson and Sinclair (1957)
Electronic amplifiers