H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/15, 179/37
H03F 3/04 (2006.01) H03F 3/213 (2006.01) H03F 3/26 (2006.01) H03F 3/30 (2006.01)
Patent
CA 1111520
ABSTRACT OF THE DISCLOSURE Electronic apparatus is disclosed suitable for integrated circuit fabrication and comprising shunt voltage regulation, The electronic apparatus may be a radio receiver which uses an unregulated current source for its supply voltage. The power amplifier of the audio amplifier has a pair of conventional large area push-pull output transistors which are connected in shunt with the supply. In accordance with the invention, shunt voltage regulation of the supply voltage is achieved by sensing a change in the supply voltage using a zener diode for a voltage reference and then altering the idling current in the output transistors in response to changes in current flow through the zener diode In consequence of increases in idling current, the output stages shift from the class B toward class A operation and shunt regulate the supply voltage. The zener diode arranged to provide both stabilization of the full supply voltage and the centering voltage of the push-pull output amplifier.
280696
Company General Electric
Eckersley Raymond A.
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