Tri-state chopper for frequency conversion

Details Tri-state chopper for frequency conversion Tri-state chopper for frequency conversion

2006-05-21

2009-11-17

Jackson, Blane J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

Reexamination Certificate

active

07620381

ABSTRACT:
A tri-state chopper (TSC) circuit and method is disclosed. The tri-state chopper (TSC) circuit receives an input signal and a ternary signal and generates an output signal, wherein: the output signal tracks the input signal in both magnitude and sign when the ternary signal is in a first state; the output signal tracks the input signal in magnitude but has an opposite sign when the ternary signal is in a second state; and the output signal is set to zero when the ternary signal is in a third state.

REFERENCES:
patent: 4468784 (1984-08-01), Jagnow et al.
patent: 5697091 (1997-12-01), Hirschenberger et al.
patent: 6041223 (2000-03-01), Thomas
patent: 6845233 (2005-01-01), Louis et al.
patent: 7471134 (2008-12-01), Dornbusch

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