Amplifier with feedback having high power supply rejection

Details Amplifier with feedback having high power supply rejection Amplifier with feedback having high power supply rejection

1993-08-02

1994-11-15

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including signal feedback means

330292, H03F 138

Patent

active

053651995

ABSTRACT:
A class A amplifier (20) includes an amplifier (21), a capacitor (22), and an output stage (23). The output stage (23) includes a source-follower transistor (24) and a feedback circuit (25). The source-follower transistor (24) receives an analog signal from the amplifier (21) and provides a corresponding output signal to a load. The feedback circuit (25) provides current feedback to maintain a relatively constant drain current in the source-follower transistor (24). The class A amplifier (20) with the feedback circuit (25) provides high current drive capability with low quiescent power consumption, high power supply rejection, high voltage gain, and stable operation without the use of a Miller compensation capacitor.

REFERENCES:
patent: 3601712 (1971-08-01), Elazar
patent: 4713625 (1987-12-01), Whatley
patent: 4912427 (1990-05-01), Rybicki
patent: 4933644 (1990-06-01), Fattaruso et al.
patent: 5057789 (1991-10-01), Nagaraj
patent: 5083095 (1992-01-01), Madaffari
patent: 5113148 (1992-05-01), Theus
patent: 5117200 (1993-05-01), Scott, III
patent: 5148120 (1993-09-01), Kano et al.

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