Air Force

Low power, low noise figure, latch driver circuit

  • US Patent No. 7299028
  • Issued: November 20, 2007
  • Status: Expired
Communications

A latch driver circuit is provided as a local oscillator driver for driving a passive mixer of an RF receiver. The driver circuit includes a differential amplifier stage coupled to a supply and a biasing circuit. The amplifier stage is operative to receive and process first and second input signals from a local oscillator for providing first and second amplified signals. The driver circuit further includes a latch stage coupled to the differential amplifier stage, which is operative to receive and process the first and second amplified signals for providing latched versions thereof. A filtering stage of the latch driver circuit is operative to receive and filter the latched versions of the first and second amplified signals for providing first and second mixer signals. Each of the first and second mixer signals includes signal content associated with a fundamental frequency particularly tuned for driving the passive mixer circuit.

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