Apparatus and method for frequency compensating an operational a

Details Apparatus and method for frequency compensating an operational a Apparatus and method for frequency compensating an operational a

1993-11-09

1995-02-21

Mottola, Steven

Amplifiers

Signal feedback

Phase shift means in loop path

330292, H03F 134

Patent

active

053920007

ABSTRACT:
A transimpedance circuit (201), and method therefor, frequency compensates an operational amplifier. The transimpedance circuit (201) has an input terminal (205) coupled to receive an amplified signal (205) and an ouput terminal (206) operative to produce a buffered amplified signal. The input terminal (205) of the transimpedance circuit (201) presents a resistive input impedance to the amplified signal at a frequency substantially near an open loop unity gain frequency of the operational amplifier (200). The amplified signal is buffered from a complex impedance of an input terminal (206) of an output driver (103). The present invention advantageously provides wide bandwidth and stable operation with loads having low complex impedance.

REFERENCES:
patent: 4415868 (1983-11-01), Gross
patent: 5023564 (1991-06-01), Jobling
patent: 5128630 (1992-07-01), Mijuskovic

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