Integrated Device Technology, Inc.

Teck-Chuan Ng

Hui Henry Li

Stephen E Aycock

An apparatus includes a first circuit, a second circuit and a third circuit. The first circuit may be configured to generate a first code by counting a number of cycles of an input clock signal during a period. The period may be determined by an output clock signal and a second code. The second circuit may be configured to generate a third code by a delta-sigma modulation of the first code. The third circuit may be configured to generate the output clock signal in response to the third code. An accuracy of a frequency of the output clock signal may be determined by a current value of the second code.

Frequency synthesizer with tunable accuracy

An apparatus includes a first circuit, a second circuit and a third circuit. The first circuit may be configured to generate a first code by counting a number of cycles of an input clock signal in a period determined by (i) an output clock signal and (ii) a second code. The second code may be variable. The second circuit may be configured to generate a third code by a delta-sigma modulation of the first code. The third circuit may be configured to generate the output clock signal (i) in response to the third code and (ii) within an accuracy determined the second code.

Growing community of inventors

San Jose, CA, United States of America

Teck-Chuan Ng