Hae Seung Lee, Keith G Fife: Low noise active pixel image sensor using a modified reset value. Melexis Tessenderlo, Gauthier & Connors, October 27, 2009: US07609303 (89 worldwide citation)

A method and apparatus to perform low noise reset of a pixel circuit within an active pixel image sensor.

K O Kenneth, Hae Seung Lee, L Rafael Reif: Merged bipolar and insulated gate transistors. Massachusetts Institute of Technology, Hamilton Brook Smith & Reynolds, July 2, 1991: US05028977 (87 worldwide citation)

A vertical bipolar transistor is formed along with an IGFET transistor in a process in which the bipolar transistor collector, base and emitter structure is formed in the body of a semiconductor mesa-like structure while the IGFET transistor is formed in and along one of the sidewalls of the structu ...

Kush Gulati, Hae Seung Lee: Reconfigurable analog-to-digital converter. Massachusetts Institute of Technology, Daly Crowley & Mofford, February 3, 2004: US06686860 (86 worldwide citation)

A reconfigurable ADC includes a plurality of reconfigurable blocks for allowing the ADC to provide a plurality of architectures. In one embodiment, the ADC can be configured to operate in a pipeline mode and a sigma-delta mode. This arrangement provides an ADC having a relatively large range of band ...

Hae Seung Lee: Split parity spare disk achieving method in raid subsystem. Samsung Electronics, Robert E Bushnell Esq, May 30, 2000: US06070249 (67 worldwide citation)

A split parity spare disk achieving method for improving the defect endurance and performance of a RAID subsystem which distributively stores data in a disk array consisting of a plurality of disk drives and carries out an input/output operation in parallel includes the steps of: constructing the di ...

Hae Seung Lee, Roger T Howe, Joseph T Kung: Digital technique for precise measurement of variable capacitance. Massachusetts Institute of Technology, Hamilton Brook Smith & Reynolds, August 22, 1989: US04860232 (60 worldwide citation)

The present invention comprises a circuit for measuring the capacitive differences of small capacitors. The circuit comprises a reference capacitor and a sensor capacitor. Connected to one of the plates of each capacitor is a switch which connects the capacitors to one of two reference voltages. The ...

Hae Seung Lee: CMOS active pixel with reset noise reduction. SMaL Technologies, Theresa A Lober, August 17, 2004: US06777660 (52 worldwide citation)

A CMOS image sensor array has rows and columns of active pixels. In addition, there are one or more column lines each cooperating with the active pixels in the respective columns. Each active pixel has an output connected to a column line. Each active pixel includes a photodiode that produces a sign ...

Hae Seung Lee, Keith Glen Fife: Circuit and method for cancellation of column pattern noise in CMOS imagers. SMaL Camera Technologies, Gauthier & Connors, June 7, 2005: US06903670 (44 worldwide citation)

A circuit and method measure the output voltage of a CMOS pixel in a manner that substantially reduces all columnar pattern noise due to mismatches in the signal processing circuits including the correlated double sampling amplifiers and A/D converters. The circuit includes a test switch, operativel ...

Andrew N Karanicolas, Hae Seung Lee: Digitally self-calibrating pipeline analog-to-digital converter. Massachusetts Institute of Technology, Samuels Gauthier & Stevens, March 12, 1996: US05499027 (43 worldwide citation)

A self-calibrating pipeline analog-to-digital converter having a plurality of analog-to-digital conversion units and including a recursive calibrating section operable for calibrating errors associated with an immediately preceding first conversion unit. The recursive calibrating section includes ci ...

Hae Seung Lee: Analog-to-digital conversion circuit with improved differential linearity. May 16, 1995: US05416485 (39 worldwide citation)

An analog-to-digital converter having at least one stage, each stage comprising an array of capacitors, one or more comparators, an operational amplifier, and switches. Each stage operates in two phases, the sampling phase and the amplifying phase. During the sampling phase, the input voltage is sam ...

Hae Seung Lee, John F Bulzachelli: Bandpass sigma-delta modulator employing high-Q resonator for narrowband noise suppression. Massachusetts Institute of Technology, Samuels Gauthier & Stevens, December 5, 2000: US06157329 (34 worldwide citation)

The invention provides a superconducting bandpass sigma-delta modulator for use in analog-to-digital converters for converting an analog input signal to a digital output signal. The modulator includes an input unit, a sampling pulse generator unit, a quantizer unit, and a high Q resonator unit. The ...