Amplifier arrangement with output power boosting

Details Amplifier arrangement with output power boosting Amplifier arrangement with output power boosting

1990-06-18

1991-09-24

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330261, 330 11, 330288, H03F 304

Patent

active

050517082

ABSTRACT:
In order to boost the output power of a first amplifier (A1) a second amplifier (A2) can increase the supply voltage difference across the first amplifier (A1). However, variations of the supply voltage difference result in comparatively high distortion. In order to minimize this distortion while maintaining the output power, a signal-follower circuit generates a direct voltage lever which tracks a first output signal of the first amplifier, for which purpose the signal-follower circuit is driven by a third amplifier, which compares the first output signal with a reference signal.

REFERENCES:
patent: 4559502 (1985-12-01), Huijsing
patent: 4752747 (1988-06-01), Botti et al.

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