Capacitor load mixer with PAM function

Details Capacitor load mixer with PAM function Capacitor load mixer with PAM function

2007-10-23

2007-10-23

Nguyen, Tony T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S313000, C455S334000

Reexamination Certificate

active

10688842

ABSTRACT:
A phase alternating mixer is implemented by common-base differential transistor pairs, with two cross-coupled pairs providing a switching mixer function with harmonic gating suppression of harmonic responses to the switching mixing by control of local oscillator signals controlling switching of the differential transistor pairs. Rather than a resistive load, a switched capacitance load and integrating capacitors are connected to the output of the differential transistor pairs to provide first order low pass filtering of the double sideband output from the differential pairs, with a controlled bandwidth. Channel select switches demultiplex the double sideband signal into a baseband signal.

REFERENCES:
patent: 6301306 (2001-10-01), McDonald et al.
patent: 6417737 (2002-07-01), Moloudi et al.
patent: 6714776 (2004-03-01), Birleson
patent: 2004/0142674 (2004-07-01), Kuiri

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