Amplifiers – Sum and difference amplifiers
Reexamination Certificate
2006-08-03
2008-09-02
Pascal, Robert J. (Department: 2817)
Amplifiers
Sum and difference amplifiers
C330S295000
Reexamination Certificate
active
07420413
ABSTRACT:
An amplifier circuit of a BTL system is disclosed, which comprises a first operational amplifier which outputs an output signal having a same phase as an input signal input to a signal input terminal, a second operational amplifier which outputs an output signal having an opposite phase to the input signal, a voltage divider which generates a midpoint voltage of the input signal, a first resistor connected between an output terminal and a negative phase input terminal of the first operational amplifier, second and third resistors connected in series between the negative phase input terminals of the first and second operational amplifiers, a fourth resistor connected between an output terminal and the negative phase input terminal of the second operational amplifier, and an impedance converter connected between a midpoint voltage node of the voltage divider and a series-connection node of the second and third resistors.
REFERENCES:
patent: 4320351 (1982-03-01), Brown et al.
patent: 4853648 (1989-08-01), Imanishi
patent: 5241283 (1993-08-01), Sutterlin
patent: 5568561 (1996-10-01), Whitlock
patent: 6160446 (2000-12-01), Azimi et al.
patent: 6507223 (2003-01-01), Felder
patent: 6765437 (2004-07-01), Goutti et al.
patent: 2007/0241813 (2007-10-01), Freeke
patent: 4-343506 (1992-11-01), None
Kabushiki Kaisha Toshiba
Pascal Robert J.
Wong Alan
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