Amplifiers – Sum and difference amplifiers
Patent
1998-07-20
2000-06-20
Pascal, Robert
Amplifiers
Sum and difference amplifiers
330292, 333213, H03F 345, H03F 114, H03H 1100
Patent
active
060782153
ABSTRACT:
A circuit for modifying the impedance of a subject circuit includes a driving impedance element having an impedance characteristic which is substantially proportional to the impedance characteristics of the subject circuit. The circuit of the present circuit further includes a voltage controlled voltage source circuit which is coupled to the driving impedance element to proportionally add or subtract current from the applied subject circuit. The voltage controlled voltage source circuit provides a given voltage to the combined subject circuit and driver impedance element that is effectively proportional to the voltage potential difference across the subject circuit, thereby providing an enhanced effective impedance for the subject circuit.
REFERENCES:
patent: 3747008 (1973-07-01), Zaretsky
patent: 3810035 (1974-05-01), Gundry
patent: 3816661 (1974-06-01), Huszty et al.
patent: 4283604 (1981-08-01), Chambers, Jr.
patent: 4963845 (1990-10-01), Collier
patent: 4979218 (1990-12-01), Strahm
patent: 5095282 (1992-03-01), Dayton
patent: 5399993 (1995-03-01), Kleinberg
patent: 5475327 (1995-12-01), Wu et al.
patent: 5568561 (1996-10-01), Whitlock
patent: 5694081 (1997-12-01), Fiori, Jr.
patent: 5751823 (1998-05-01), Strickland et al.
patent: 5861775 (1999-01-01), Chen et al.
Nguyen Patricia T.
Pascal Robert
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