Patent Number: 6,298,093

Title: Apparatus and method for phase and frequency digital modulation

Abstract: Apparatus for phase/frequency digital modulation includes a digital circuit receiving and processing a digital modulation input signal to generate a digital modulation control signal, a digital-to-analog converter coupled to the digital circuit converts the digital modulation control signal into an analog modulation control signal, and an RF/analog circuit is coupled to the digital-to-analog converter. The RF/analog circuit includes a voltage controlled oscillator to generate a modulated output signal in response to the analog modulation control signal, and a quadrature tuner coupled to the voltage controlled oscillator generates an in-phase tuner output and a quadrature tuner output in response to the modulated output signal. An analog-to-digital converter is coupled to the quadrature tuner and converts the in-phase tuner output and the quadrature tuner output to digital in-phase and quadrature tuner outputs. The digital in-phase tuner output and the quadrature tuner output are fed back to the digital circuit to generate the digital modulation control signal.

Inventors: Genrich; Thad J. (Arapahoe, CO)

Assignee: Raytheon Company

International Classification: H03C 3/00 (20060101); H03C 3/09 (20060101); H03K 007/06 ()

Expiration Date: 10/02/2018