Circuit arrangement with an operational amplifier

Details Circuit arrangement with an operational amplifier Circuit arrangement with an operational amplifier

1997-07-24

1999-09-07

Lee, Benny T.

Amplifiers

With semiconductor amplifying device

Including signal feedback means

330288, H03F 304

Patent

active

059492880

ABSTRACT:
This circuit arrangement has the property of an amplifier with a set or adjustable non-inverting gain and contains an opamp (3) having an a non-inverting and an inverting input (31, 32) as well as an output (33) which is also a signal output (A) of the circuit arrangement, and a current copier (8) having a current input and a current output. The noninverting input (31) is connected to a first reference potenial (P.sub.1) and the output (33) via a first resistor (1) to the inverting input (32). The input (E) of the circuit arangement is connected via a second resistor (2) to the current input of the current copier (8) the current output of which is connected to the inverting input (32). The output section of the current copier is connected to a second reference potential (P.sub.2) and its input section to the first reference potential.

REFERENCES:
patent: 4215317 (1980-07-01), Traynor
patent: 5432389 (1995-07-01), Bader et al.
Tietze, U. and Schenk, Ch., Halbleiter-Schaltungstechnik, 1989, 9th Edition, pp. 132-137.
Tietze, U. and Schenk, Ch., Electronic Circuits Design and Applications, 1991, pp. 118-123.

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