Hans W Klein, 70Bonsall, CA

6362684, Mar 26, 2002

Feb 17, 2000

09/506180

Hans W. Klein - Danville CA
Jian Li - Portland OR
Yaohua Yang - West Linn OR

Lattice Semiconductor Corporation - Hillsboro OR

H03G 310

330 86, 330282

Provided is an amplifier circuit and method of using the same that features an adjustable resistor network to enable varying the operational characteristics of an amplifier. The resistor network includes primary resistors connected in series with a plurality of adjustment resistors connected to the output of an operational amplifier. A switching network is connected between the resistor network and the input of the operational amplifier. The switching network enables selectively varying the input and feedback resistance of the amplifier circuit to obtain a desired differential gain, while minimizing common-mode gain.

6583652, Jun 24, 2003

May 30, 2002

10/159009

Hans W. Klein - San Jose CA
Jian Li - Portland OR
Paul Hildebrant - Banks OR

Lattice Semiconductor Corporation - Hillsboro OR

H03K 522

327103, 327 65, 330254

An improved programmable transconductor can be efficiently implemented utilizing a programmable resistor circuit that allows for only a selected portion of the resistor circuit (associated with a desired transconductor gain) to be coupled between summing nodes of the transconductor. Additional switching circuits can be used to reduce gain errors associated with the switches used to implement the aforementioned solution. Additionally, the improved programmable transconductor can be integrated into fully differential programmable analog integrated circuits, thereby enhancing the performance of such integrated circuits.

6717451, Apr 6, 2004

May 30, 2002

10/159089

Hans W. Klein - San Jose CA
Paul Hildebrant - Banks OR
Joey Doernberg - San Jose CA
Jian Li - Portland OR

Lattice Semiconductor Corporation - Hillsboro OR

H03L 500

327333, 326 80

The inventive level shifting circuit shifts an analog input signal by a precise amount. This allows it to be used in precision instrumentation applications where precise signal shifts are critical. It uses a self-biasing feedback circuit to determine the bias current needed to shift an analog signal by a desired amount. The circuit automatically compensates for influences by temperature, supply voltage, and process variations. This circuit also has value as a stand-alone function for other (non-programmable) products.

6885227, Apr 26, 2005

Jul 29, 2003

10/629221

Om P. Agrawal - Los Altos CA, US
Hans W. Klein - Danville CA, US
Geoffrey R. Rickard - Glos, GB
Harald J. Weller - Bristol, GB

Lattice Semiconductor Corporation - Hillsboro OR

H03L007/06

327156, 327291, 327296

Systems and methods are disclosed to provide clock generation. In accordance with one embodiment, a clock generator chip is provided that is configurable and in-system programmable and includes a flexible skew control architecture. The clock generator chip may also provide programmable input circuits, programmable output circuits, and permit a JTAG boundary scan.

7019577, Mar 28, 2006

Jul 29, 2003

10/629223

Om P. Agrawal - Los Altos CA, US
Hans W. Klein - Danville CA, US

Lattice Semiconductor Corporation - Hillsboro OR

G06F 1/04

327296, 327291

Systems and methods are disclosed to provide clock generation. In accordance with one embodiment, a clock generator chip is provided that is configurable and in-system programmable. The clock generator chip may provide programmable input circuits, programmable output circuits, and permit a JTAG boundary scan.

7034599, Apr 25, 2006

Jan 27, 2005

11/044508

Om P. Agrawal - Los Altos CA, US
Hans W. Klein - Danville CA, US
Geoffrey R. Rickard - Glos, GB
Harald J. Weller - Bristol, GB

Lattice Semiconductor Corporation - Hillsboro OR

G06F 1/04

327291, 327156, 327296

Systems and methods are disclosed to provide clock generation. In accordance with one embodiment, a clock generator chip is provided that is configurable and in-system programmable and includes a flexible skew control architecture. The clock generator chip may also provide programmable input circuits, programmable output circuits, and permit a JTAG boundary scan.

7111183, Sep 19, 2006

Oct 10, 2002

10/269804

Hans W. Klein - Danville CA, US
Frederic N. F. Deboes - Austin TX, US
Douglas C. Morse - Hillsboro OR, US

Lattice Semiconductor Corporation - Hillsboro OR

G06F 1/24
G06F 1/26

713330, 713 1, 713100

Power-sequencing controllers are connected to allow more complex power sequencing and/or larger numbers of voltage supplies to be monitored than with a single controller. Power-on-reset (POR) output signals from the “slave” controllers are connected by a wired-OR, and the composite output is used as a reset signal or indicator signal by the “master” controller. An output from the master controller coupled to the composite input signal is connected with the {overscore (POR)} output of the master controller by a wired-OR, and this composite signal is coupled to the reset terminals of the slave controllers. Connecting controllers in a master/slave configuration allows prevents any of the slave devices from starting until all the devices have been released, resulting in synchronous processing of subsequent signals and events.

8059849, Nov 15, 2011

Mar 5, 2008

12/042673

Hans W. Klein - Danville CA, US
Bal S. Sandhu - Fremont CA, US

National Acquisition Sub, Inc. - Santa Clara CA

H04R 25/00

381355, 381111, 381369, 381182

An acoustic processing module receives an acoustic signal, and outputs an analog output signal. Microphone sensors are provided for generating a corresponding electrical signal in response to the acoustic signal. A signal processing circuit is connected to the microphone sensors, and processes the electrical signals according to one or more analog signal processing functions to generate the analog output signal. An integrated casing encapsulates the microphone sensors and the analog processing circuit, and prevents external interference from affecting any electrical signals within the integrated casing.