Andrew C Brost

US Patent:

47590149, Jul 19, 1988

Filed:

May 28, 1987

Appl. No.:

7/055473

Inventors:

David G. Decker - Sunnyvale CA
Andrew C. Brost - San Jose CA
Roy I. Vandermolen - Pleasanton CA

Assignee:

Ampex Corporation - Redwood City CA

International Classification:

H04J 322
H04J 312

US Classification:

370 84

Abstract:

Digital data is received on a plurality of input channels at unrelated, asynchronous input clock rates. The data is multiplexed and transmitted via one or more synchronous parallel channels, together with encoded information related to the original asynchronous input clock rate on each channel. The data received from the synchronous channels is demultiplexed and redistributed to proper output channels and clocked out therefrom at rates derived from the encoded and reconstituted asynchronous clock rate information from each channel.

US Patent:

49032259, Feb 20, 1990

Filed:

Dec 23, 1988

Appl. No.:

7/290717

Inventors:

Andrew C. Brost - San Jose CA

Assignee:

Ampex Corporation - Redwood City CA

International Classification:

G06F 15336

US Classification:

36472803

Abstract:

High speed digital data correlator utilizing as a summing circuit single bit full adder cells in a synchronous pipelined array arrangement to sum the number of bit matches with a selected correlation word in a serial data stream. Each adder cell has up to three inputs and provides a partial sum by adding up to three bits of equal powers of two. The simple full adder cell architecture minimizes interconnect lengths between the adjacent synchronous stages of the summing circuit and maintains near constant circuit density across the stages. These features contribute to an optimization of the operational speed of the correlator for any given circuit technology. The correlator of the preferred embodiment detects two complementary, mutually exclusive correlation words, using the same correlation circuit.

US Patent:

20160295029, Oct 6, 2016

Filed:

Mar 31, 2016

Appl. No.:

15/087985

Inventors:

- Suwanee GA, US
Andrew Carl Brost - Cool CA, US

International Classification:

H04M 19/08
H04M 11/06

Abstract:

A method for operating a power supply circuit of a communications device involves operating the power supply circuit in a first operating mode in which a switching frequency of the power supply circuit is higher than an operating frequency band of the communications device and switching the power supply circuit to operate in a second operating mode in response to connecting the power supply circuit to a battery by decreasing the switching frequency of the power supply circuit.