OP-amp circuit

Details OP-amp circuit OP-amp circuit

2009-12-28

2011-11-08

Nguyen, Khanh (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

08054132

ABSTRACT:
An OP-amp circuit includes a first circuit unit configured to generate an operating voltage in response to an enable signal, a second circuit unit configured to amplify a difference between respective voltages received through an inverting terminal and a non-inverting terminal in response to the operating voltage and to output a result of the amplification as a first drive voltage, a third circuit unit configured to output a second drive voltage according to a voltage level of the first drive voltage inputted thereto, and a fourth circuit unit configured to divide an input voltage inputted thereto into a divided voltage according to two resistances having respective resistive values varying according to the first and second drive voltages and to output the divided voltage through an output terminal.

REFERENCES:
patent: 5220288 (1993-06-01), Brooks
patent: 6879212 (2005-04-01), Suzuki
patent: 2004-020325 (2004-01-01), None
patent: 1020030037011 (2003-05-01), None
Notice of Preliminary Rejection issued from Korean Intellectual Property Office on Aug. 26, 2010.
Notice of Preliminary Rejection issued from Korean Intellectual Property Office on Feb. 22, 2011.

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