Steven R Green

US Patent:

6765436, Jul 20, 2004

Filed:

Sep 4, 2002

Appl. No.:

10/234893

Inventors:

John L. Melanson - Austin TX
Xiaofan Fei - Austin TX
Johann G. Gaboriau - Austin TX
Steven Green - Austin TX
Jason P. Rhode - Austin TX

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03F 338

US Classification:

330 10, 330132, 330207 A

Abstract:

A gain control at the input monitors an input signal and a supply voltage, which drives an output. The gain control adjusts the gain to compress the input signal when the supply voltage decreases in magnitude and/or the input signal is of such magnitude to cause the supply voltage to decrease.

US Patent:

6853242, Feb 8, 2005

Filed:

Jun 14, 2004

Appl. No.:

10/867264

Inventors:

John L. Melanson - Austin TX, US
Xiaofan Fei - Austin TX, US
Johann G. Gaboriau - Austin TX, US
Steven Green - Austin TX, US
Jason P. Rhode - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03F003/04
H03F003/38
H03F003/217

US Classification:

330 10, 330285, 330297, 330279, 330207 A, 330132

Abstract:

A gain control at the input monitors an input signal and a supply voltage, which drives an output. The gain control adjusts the gain to compress the input signal when the supply voltage decreases in magnitude and/or the input signal is of such magnitude to cause the supply voltage to decrease.

US Patent:

7350001, Mar 25, 2008

Filed:

Jan 17, 2003

Appl. No.:

10/346532

Inventors:

Dylan Alexander Hester - Austin TX, US
John Laurence Melanson - Austin TX, US
Steven Green - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

G06F 3/00
G06F 13/12
G06F 1/00
G06F 1/12

US Classification:

710 65, 710 58, 710 66, 710 69, 713400, 713500

Abstract:

Methods and Apparatuses are provided for automatically converting a word length of sample data being transmitted over a serial link. A serial interface transmits and/or receives one or more data words comprising digital signals, a bit clock synchronizes transmission of individual bits, and a word clock is used to group the bits into sample words. A desired word length is determined based on the relationship between the bit clock and the word clock during the transmission or reception of a data word. Based on the desired word length, the sample data is either truncated or padded, and an appropriate amount of dither is added to the sample words to reduce the distortion and quantization artifacts introduced by the word length conversion.

US Patent:

7680236, Mar 16, 2010

Filed:

Dec 21, 2006

Appl. No.:

11/614368

Inventors:

John L. Melanson - Austin TX, US
Zhong You - Austin TX, US
Scott Allan Woodford - Austin TX, US
Steven Randall Green - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03D 3/24

US Classification:

375376

Abstract:

A hybrid analog/digital phase-lock loop for low-jitter synchronization provides a mechanism for generating a low-jitter clock from a timing reference that has a high jitter level. A numerically-controlled analog oscillator provides a clock output and has an input for receiving a rational number. The rational number represents a ratio between the frequency of the clock output and the frequency of another stable clock provided to the circuit. A counter divides the frequency of either the clock output or the stable clock, providing feedback or feed-forward control of the analog oscillator, respectively. The circuit also includes a digital phase-frequency detector for detecting an on-going phase-frequency difference between an input timing reference and an output of the divider and a digital loop filter for filtering the output of the phase-frequency detector to provide the rational number that controls the frequency of the numerically-controlled analog oscillator.

US Patent:

7746972, Jun 29, 2010

Filed:

Mar 22, 2007

Appl. No.:

11/689729

Inventors:

John L. Melanson - Austin TX, US
Zhong You - Austin TX, US
Scott Allan Woodford - Austin TX, US
Steven Randall Green - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03D 3/24

US Classification:

375376, 375354, 375371, 375375, 455260, 455516, 327141, 327147, 327156

Abstract:

A numerically-controlled phase-lock loop with input clock dependent ratio adjustment provides for narrower-bandwidth loops that lock to a wide range of frequencies and/or operation with an absent or degraded input timing reference. A timing reference characteristic detector determines an input frequency range of the input timing reference signal, the data type of the timing reference, and/or whether a timing reference signal of sufficient quality is present. A numerically controlled oscillator is controlled by a numeric ratio that is adjusted to provide the desired clock frequency output in conformity with the detected frequency range and/or data type. If the timing reference signal is absent or degraded, then the numeric ratio can be set to a fixed value or a local timing reference can be applied in order to generate the desired clock output frequency.

US Patent:

7840015, Nov 23, 2010

Filed:

Sep 4, 2002

Appl. No.:

10/234896

Inventors:

John L. Melanson - Austin TX, US
Xiaofan Fei - Austin TX, US
Johann G. Gaboriau - Austin TX, US
Steven Green - Austin TX, US
Jason P. Rhode - Austin TX, US
Eric Walburger - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03G 3/00
H03G 3/20
H03F 3/38

US Classification:

381107, 381120, 330 2, 330 10, 330207 A, 330289

Abstract:

A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.

US Patent:

8447050, May 21, 2013

Filed:

Oct 21, 2010

Appl. No.:

12/909262

Inventors:

John L. Melanson - Austin TX, US
Xiaofan Fei - Austin TX, US
Johann G. Gaboriau - Austin TX, US
Steven Green - Austin TX, US
Jason P. Rhode - Austin TX, US
Eric Walburger - Austin TX, US

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

H03F 99/00
H03F 3/38

US Classification:

381120, 381117, 330 2, 330 10, 330207 A, 330289

Abstract:

A thermal sensor at the output of a switching amplifier senses heat dissipation at the output switch. If an overheating condition is sensed, gain of the digital input signal is lowered to reduce output power of the audio output signal.

US Patent:

6000665, Dec 14, 1999

Filed:

May 15, 1998

Appl. No.:

9/079878

Inventors:

David Clementson - Palo Alto CA
Steven R. Green - Austin TX

International Classification:

B68G 500

US Classification:

248118

Abstract:

A support device and method for use of a support device with a miniature electronic device are provided by the present invention. Use of the miniature electronic device is facilitated by the present invention's anchoring the miniature electronic device and ergonomically supporting the operator's hand such relative to the miniature electronic device. In the preferred embodiment of the invention, the support device includes a base member having a receiving member adapted to securably receive a miniature electronic device formed in an upper surface of the base member. The base member is preferably formed of an elastomeric material. The upper surface of the base member is dimensioned to support the hand of an operator of the miniature electronic device, such that the level of the operator's hand is substantially coplanar with the level of the top surface of the miniature electronic device. The receiving member can be positioned to accommodate right or left-handed operators. The receiving member can be formed either completely through the base member, as a depression that does not extend through the base member, and can be an insert member joined with the base member.

Author:

Steven J. Green

ISBN #:

9004139850