1
William J Riley Jr: Automatic pretuning of a voltage controlled oscillator in a frequency synthesizer using successive approximation. Harris Corporation, L Lawton Rogers III, June 9, 1981: US04272729 (54 worldwide citation)

The automatic pretuning of a voltage controlled oscillator in a phase locked loop frequency synthesizer utilizes a successive approximation technique to rapidly bring the coarse tuning voltage of the oscillator to the desired pretuning value. A digital number stored in a digital register is converte ...


2
William J Riley Jr: Control device for a phase lock loop vernier frequency synthesizer. Harris Corporation, L Lawton Rogers III, November 18, 1980: US04234929 (27 worldwide citation)

Disclosed is a device for controlling the selection of divider factors in a vernier frequency synthesizer employing a pair of phase lock loops coupled through a mixer to supply a synthesized output signal frequency. The control device generates a pair of divider factors for the respective programmab ...


3
Robert Lutwak, William J Riley Jr, Kenneth D Lyon: MEMS analog frequency divider. Symmetricom, Thomas J Engellenner, Reza Mollaaghababa, Nutter McClennen & Fish, August 12, 2003: US06605849 (16 worldwide citation)

The present invention provides an analog frequency divider structure that receives an input signal at a selected frequency and generates an output signal at a fraction, e.g. one-half, of the input frequency. In one embodiment, the analog frequency divider structure is implemented as a MEMS device ha ...


4
William J Riley Jr: Methods and apparatus for rapid and accurate frequency syntonization of an atomic clock. EG&G, Finnegan Henderson Farabow Garrett & Dunner, October 9, 1984: US04476445 (14 worldwide citation)

Methods and apparatus for rapidly and automatically syntonizing the frequency of a passive atomic resonator of an atomic clock with a reference frequency which corresponds to the frequency of an external reference signal. Any difference between the hyperfine transition frequency of the resonator and ...


5
William J Riley Jr, Robert Lutwak: Miniature gas cell with folded optics. Symmetricom, Brinks Hofer Gilson & Lione, June 20, 2006: US07064835 (10 worldwide citation)

A miniature optical system for use in instruments based on laser spectroscopy of atomic and molecular samples, such as atomic frequency standards and magnetometers. The miniature optical system employs a folded optical path that allows light from a laser diode to pass through the cell twice, reflect ...


6
William J Riley Jr: Power supply circuit for an alkali vapor spectral lamp. EG&G, Finnegan Henderson Farabow Garrett Dunner, January 26, 1988: US04721890 (2 worldwide citation)

The output of an alkali vapor lamp for use in an optical pumping system is stabilized by use of a feedback circuit which regulates current flow from a power supply to an electronic power oscillator used to excite the alkali vapor lamp. Starting of the alkali vapor lamp is facilitated by increasing s ...