Kent Kernahan: Switching power converter controller. Fyre Storm, Jonathan Hallman, MacPherson Kwok Chen & Heid, August 15, 2006: US07092265 (45 worldwide citation)

A control system and method for simultaneously regulating the operation of a plurality of different types of switching power converters. The system utilizes in regulating the power converters sampled data and nonlinear feedback control loops.

Farrokh Mohamadi: Phase management for beam-forming applications. Jonathan Hallman, MacPherson Kwok Chen & Heid, January 3, 2006: US06982670 (20 worldwide citation)

A beam-forming antenna system includes an array of integrated antenna circuits. Each integrated antenna circuit includes an oscillator coupled to an antenna. A network couples to the integrated antenna units to provide phasing information to the oscillators. A controller controls the phasing informa ...

Ron J Kadlec, Charles R Watt, Christopher J Turner: Digital servo system with biased feed-forward. DPHI Acquisitions, Jonathan Hallman, MacPherson Kwok Chen & Heid, March 28, 2006: US07020054 (12 worldwide citation)

A digital servo system with a biased feed-forward control is disclosed. The biased feed-forward control determines the low frequency component of a control signal from the digital servo system. The low frequency component can then be added to a future control signal to form an adjusted control signa ...

Ian R Redmond: Micro lens and method and apparatus for fabricating. DPHI Acquisitions, Jonathan Hallman, MacPherson Kwok Chen & Heid, July 5, 2005: US06914724 (8 worldwide citation)

Micro lenses are fabricated using processes which operate on multiple lenses at a time. In one embodiment, wafer-scale processing includes employing photolithography for defining gray-scale masks which permit relatively smooth or continuous curvatures of lens surfaces to be formed by, e.g., reactive ...

Xiang Zhu, Ming Qu, Zhengyu Yuan: Control signal generation for a low jitter switched-capacitor frequency synthesizer. Lattice Semiconductor Corporation, Jonathan Hallman MacPherson Kwok Chen & Heid, February 21, 2006: US07002418 (6 worldwide citation)

A phase detector and control signal generator responds to a reference signal and a feedback signal to produce a non-delayed up and down signal. A programmable delay unit delays the non-delayed up and down signal to provide up and down signals for a charge pump. A divider configured to respond to the ...

Curtis M Pleiss, Stanton M Keeler: Structure and method for storing data on optical disks. DPHI Acquisitions, Jonathan Hallman, MacPherson Kwok Chen & Heid, January 24, 2006: US06990058 (2 worldwide citation)

During manufacturing of optical disks, mastering equipment inserts marks (“high frequency wobble marks” or “HFWMs”) into the wobble of the groove on optical disks to store data. The presence of a HFWM at a zero crossing of the wobble indicates an active bit and the absence of the HFWM indicates an i ...

Ron J Kadlec, Christopher J Turner: Flexible servicing of servo algorithms using a digital signal processor. DPHI Acquisitions, Jonathan Hallman, MacPherson Kwok Chen & Heid, April 4, 2006: US07023766 (2 worldwide citation)

A system with a plurality of servo algorithms executing on a digital signal processor is presented. The digital signal processor receives a sensor interrupt, indicating availability of digitized data from optical sensors, and decides which of a plurality of servo algorithms to service in response to ...

Edward A Ramsden: Programmable logic device with hardwired microsequencer. Lattice Semiconductor Corporation, Jonathan Hallman, MacPherson Kwok Chen & Heid, October 25, 2005: US06958625 (1 worldwide citation)

A programmable logic device configurable to implement a finite state machine includes a hardwired microsequencer for executing microinstructions to sequence the finite state machine. The hardwired microsequencer includes a sequence memory for storing the microinstructions and a program counter.

Douglas C Morse, Edward E Miller, Edward A Ramsden: Powering-up a device having digital and analog circuitry. Lattice Semiconductor Corporation, Jonathan Hallman, MacPherson Kwok Chen & Heid, April 11, 2006: US07028201

A method and apparatus is provided to power-up a device having both digital and analog circuitry. The analog circuitry requires a stabilization period before proper operation. During power-up, the digital circuitry is held in reset by a power-on reset circuit. The power-on reset circuit releases the ...

Lihu M Chiu: RFID verifier. Jonathan Hallman, MacPHERSON KWOK CHEN & HEID, January 18, 2007: US20070013522-A1

An RFID verifier is configured to vary a slope for a ramp-modulated interrogating signal to determine the slope at which an interrogated RFID tag no longer responds to the interrogating signal. In this fashion, the RFID verifier may obtain a measure of quality for the interrogated RFID tag with resp ...