Randolph B Heineke

6429499, Aug 6, 2002

May 18, 2000

09/573748

Randolph B. Heineke - Rochester MN
William K. Hogan - Rochester MN
Scott Allen Olson - Rochester MN
Clint Lee Schow - Rochester MN

International Business Machines Corporation - Armonk NY

H01L 31075

257458, 257425, 257438, 257439, 438 57, 438 69, 438 75, 438762

Disclosed is a semiconductor structure and manufacturing process for making an integrated FET and photodetector optical receiver on a semiconductor substrate. A FET is formed by forming at least one p region in a p-well of the substrate and forming at least one n region in the p-well of the substrate. A p-i-n photodetector is formed in the substrate by forming at least one p region in an absorption region of the substrate when forming the at least one p region in the p well of the FET and forming at least one n region in the absorption region of the substrate when forming the at least one n region in the p-well of the FET.

6433638, Aug 13, 2002

Sep 6, 2000

09/655816

Randolph B. Heineke - Rochester MN
Scott Allen Olson - Rochester MN
David Peter Swart - Pine Island MN
Gerald Wayne Swift - Rolling Hills Estates CA

International Business Machines Corporation - Armonk NY

H03F 345

330260, 330 85, 330110, 330311

A fully balanced transimpedance amplifier for high speed and low voltage applications is provided. An input stage of the amplifier uses a matched pair of common source connected transistors with sources tied directly to ground to eliminate the Vds overhead usually found in differential pairs. The ground connection minimizes a source resistance noise component, while matching minimizes power supply noise generation and susceptibility for an array of amplifiers. Feedback resistors along with diode connected MESFETS determine the transimpedance of the amplifier. The nonlinearity of diodes helps to soften clipping. Transresistance also determined the noise generated by the amplifier, and the diode connected MESFETS offer lower noise than resistors for the same impedance. Stability is achieved through use of only a single stage of gain in a loop of the input stage, while additional gain is achieved through cascading in the input stage. A differential stage minimizes any difference in amplitude between two sides of the amplifier input stage.

6489850, Dec 3, 2002

Mar 16, 2001

09/810133

Randolph B. Heineke - Rochester MN
Scott Allen Olson - Rochester MN
David John Orser - Farmington MN

International Business Machines Corporation - Armonk NY

H03F 314

330307, 330295, 330124 R, 330297, 257723, 257728, 257499, 257532

A multichannel parallel IC amplifier includes a plurality of amplifier circuits formed on an IC substrate. Each amplifier circuit is coupled to respective inputs via a pair of capacitors. The capacitors are configured so as to substantially equalize like sense and unlike sense coupling between adjacent channels, leading to cancellation of crosstalk signals.

6515550, Feb 4, 2003

May 10, 2001

09/852494

Kevin Paul Demsky - Rochester MN
Randolph B. Heineke - Rochester MN

International Business Machines Corporation - Armonk NY

H03L 300

331 57, 331149

A ring oscillator, such as a bipolar ring oscillator with enhanced, fast startup and shutdown includes a series of a plurality of inverting differential stages connected in a loop. The plurality of inverting differential stages includes a first multiplexer stage. The first multiplexer stage includes a first signal input, a second signal input and a select input. An oscillator feedback signal is applied to the first signal input of the first multiplexer stage. A startup circuit is coupled to the first multiplexer stage. The startup circuit includes a differential signal coupled to the second signal input of the first multiplexer stage for starting the bipolar ring oscillator. The startup circuit applies a full differential switching voltage signal to the second signal input of the first multiplexer stage to guarantee start of the bipolar ring oscillator after one delay of the series of the plurality of inverting differential stages connected in the loop. The startup circuit includes a fast transition run signal and a multiplexer select signal responsive to the run signal. The multiplexer select signal is coupled to the select input of the first multiplexer stage for controlling the first multiplexer stage to select the oscillator feedback signal or the static differential signal for stopping the bipolar ring oscillator.

6574091, Jun 3, 2003

Aug 14, 2002

10/218789

Randolph B. Heineke - Rochester MN
Scott Allen Olson - Rochester MN
David John Orser - Farmington MN

International Business Machines Corporation - Armonk NY

H01G 438

361328, 361303, 361311, 361329, 257296, 257309

A multichannel parallel IC amplifier includes a plurality of amplifier circuits formed on an IC substrate. Each amplifier circuit is coupled to respective inputs via a pair of capacitors. The capacitors are configured so as to substantially equalize like sense and unlike sense coupling between adjacent channels, leading to cancellation of crosstalk signals.

6919550, Jul 19, 2005

Nov 27, 2001

09/994229

Randolph B. Heineke - Rochester MN, US
David John Orser - Farmington MN, US

JDS Uniphase Corporation - San Jose CA

H01J040/14

250214R, 250214 C, 250214 A, 327514

A detector is provided for short wave fiber optic communication having compensation to reduce detector jitter. The detector includes a photodetector providing a modulated current. A transimpedance amplifier is coupled to the photodetector receiving the modulated current and providing an output voltage signal. An output buffer is coupled to the transimpedance amplifier receiving the output voltage signal. The output buffer includes a differential transistor pair; a pair of source degeneration resistors connected to the differential transistor pair; and a capacitor coupled between connections of the differential transistor pair and the source degeneration resistors. The value of the capacitor coupled between connections of the differential transistor pair and the source degeneration resistors is selected to reduce jitter. The capacitor passes high slew rate transimpedance amplifier output voltage signals more readily than low slew rate transimpedance amplifier output voltage signals. The effect of the capacitor is to bypass the gain limiting effects of the source degeneration resistors.

6985674, Jan 10, 2006

Nov 27, 2001

09/995108

Randolph B. Heineke - Rochester MN, US
David John Orser - Farmington MN, US

International Business Machines Corporation - Armonk NY

H04B 10/156

398214, 438 11

A fiber optic transceiver array and a fiber optic transceiver channel are provided for short wave fiber optic communications. A fiber optic transceiver array for short wave fiber optic communications includes a series of fiber optic transceiver channels. Each fiber optic transceiver channel includes a plurality of test pads. A power distribution bypass capacitor is distributed along the series of fiber optic transceiver channels. A plurality of high voltage power supply and ground connections are coupled through the power distribution bypass capacitor and distributed around the series of fiber optic transceiver channels. A threaded high voltage power supply connection is provided to alternating ones of the series of fiber optic transceiver channels. A threaded ground connection is provided to alternating other ones of the series of fiber optic transceiver channels to reduce power noise generation and susceptibility to noise between adjacent channels. A power to ground decoupling capacitor included with each fiber optic transceiver channel also enhances power noise sensitivity reduction.

7076178, Jul 11, 2006

May 25, 2005

11/137278

Randolph B. Heineke - Rochester MN, US
David J. Orser - Farmington MN, US
David P. Swart - Pine Island MN, US

International Business Machines Corporation - Armonk NY

H04B 10/156

398214, 438 11

A fiber optic transceiver array and a fiber optic transceiver channel are provided for short wave fiber optic communications. A fiber optic transceiver array for short wave fiber optic communications includes a series of fiber optic transceiver channels. Each fiber optic transceiver channel includes a plurality of test pads. A power distribution bypass capacitor is distributed along the series of fiber optic transceiver channels. A plurality of high voltage power supply and ground connections are coupled through the power distribution bypass capacitor and distributed around the series of fiber optic transceiver channels. A threaded high voltage power supply connection is provided to alternating ones of the series of fiber optic transceiver channels. A threaded ground connection is provided to alternating other ones of the series of fiber optic transceiver channels to reduce power noise generation and susceptibility to noise between adjacent channels. A power to ground decoupling capacitor included with each fiber optic transceiver channel also enhances power noise sensitivity reduction.