Power amplifying apparatus for supplying A.C. signals having a m

Details Power amplifying apparatus for supplying A.C. signals having a m Power amplifying apparatus for supplying A.C. signals having a m

1992-12-08

1994-05-31

Mottola, Steven

Amplifiers

Signal feedback

Frequency responsive feedback means

330103, H03F 134

Patent

active

053172779

ABSTRACT:
The invention features power amplifying apparatus with controllable frequency characteristic of the gain. The apparatus includes a band pass network of two cascaded amplifiers and multiple resistors and capacitors arranged to form multiple feedback loops. The feedback loops stabilize the output A.C. signals and establish a predetermined bandwidth of the network. The apparatus also includes a capacitor resistor feedback loop, connected to the output of the second amplifier and input of the first amplifier, with the capacitor and the resistor selected to maximize the loop gain at a desired frequency.

REFERENCES:
patent: 4091333 (1978-05-01), Thrap
patent: 4541040 (1985-09-01), Allfather
patent: 4686619 (1987-08-01), Edwards
patent: 4794507 (1988-12-01), Cavigelli
patent: 4973919 (1990-11-01), Allfather
patent: 5197102 (1993-03-01), Sordermeyer

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