Philip J Thurakal

US Patent:

46331913, Dec 30, 1986

Filed:

Aug 22, 1985

Appl. No.:

6/768272

Inventors:

Jacob H. Malka - Fair Lawn NJ
Philip J. Thurakal - New Milford NJ

Assignee:

Allied Corporation - Morris Township, Morris County NJ

International Classification:

H03F 126

US Classification:

330275

Abstract:

A transformer isolated high voltage, high power system is disclosed which is suitable for driving servo motors in servo loop control systems or the like. A D. C. current control loop is provided for preventing transformer saturation without gapping the transformer core. An output control loop is provided which minimizes signal crossover distortion and input/output phase shift. Crossover distortion adjustment is also implemented.

US Patent:

46775811, Jun 30, 1987

Filed:

May 30, 1985

Appl. No.:

6/739263

Inventors:

Jacob H. Malka - Fair Lawn NJ
Philip J. Thurakal - New Milford NJ

Assignee:

Allied Corporation - Morris Township, Morris County NJ

International Classification:

H03K 1302

US Classification:

364571

Abstract:

Analog input/output apparatus includes a plurality of digital to analog converters (18, 20, 22, 24, 26) and a plurality of interfacing means (4, 6, 8, 10, 12, 14, 16) for interfacing the converters with a central processing unit (2). A plurality of current and voltage sources (28, 30, 32, 34, 36, 38, 40, 42) are connected to the converters for providing a plurality of voltage and current stimuli signals and monitor signals. A signal measurement channel (44, 46, 48, 52) is responsive to the monitor signals and is controlled by the interfacing means (4-16), and multiplexers (44, 46) are wrapped around the measurement channel to provide a self-calibration channel (50). The central processing unit is responsive to the self-calibration channel output for determining the correction to be applied to the stimuli signals.

US Patent:

50436783, Aug 27, 1991

Filed:

Dec 27, 1989

Appl. No.:

7/457440

Inventors:

Philip J. Thurakal - New Milford NJ

Assignee:

Allied-Signal Inc. - Morris Township, Morris County NJ

International Classification:

H03L 708
H03L 716

US Classification:

331 16

Abstract:

A Phase Locked Loop including a monolithic Phase Locked Loop component. The monolithic component has an internal amplifier stage and an internal VCO. An external phase detector compares the phase of a reference signal to the phase of the output of the internal VCO to provide a signal which is a measure of the phase differences. The signal is filtered by an external filter, amplified by the internal amplifier stage and input to the internal VCO.