David D Stern

US Patent:

43629571, Dec 7, 1982

Filed:

Dec 29, 1980

Appl. No.:

6/220670

Inventors:

David R. Stern - Hinsdale IL

Assignee:

GTE Automatic Electric Labs Inc. - Northlake IL

International Classification:

H03K 1332

US Classification:

307527

Abstract:

A circuit arrangement for comparing a clock pulse train against a standard pulse train. The circuit includes an exclusive OR gate to which are inputted the pulse train to be tested, and a latch at the output of the gate, operated only upon a mismatch of the two pulse trains. Provision is also made to prevent operation of the latch within certain adjustable tolerance parameters as to pulse width and position of the pulse train.

US Patent:

52261247, Jul 6, 1993

Filed:

Jun 5, 1991

Appl. No.:

7/710469

Inventors:

David R. Stern - Hinsdale IL

Assignee:

Ambrosia Microcomputer Products, Inc. - Hinsdale IL

International Classification:

G06F 300
G06F 1300

US Classification:

395325

Abstract:

An interface circuit for use between a radio control transmitter equipped with joysticks and a standard data bus of a personal type computer. The interface circuitry includes a microcontroller operated as a reformatter for signals received from the remote control transmitter and a number of integrated circuit latch and buffer circuits connected between the output of the microcontroller and the data bus of a computer to convert the signals output from the microcontroller to the data bus on a direct basis.

US Patent:

48687804, Sep 19, 1989

Filed:

Jul 27, 1987

Appl. No.:

7/078213

Inventors:

David R. Stern - Hinsdale IL

Assignee:

Ambrosia Microcomputer Products, Inc. - Hinsdale IL

International Classification:

G06F 1314
G06F 3033
G06F 944

US Classification:

364900

Abstract:

A circuit providing a joystick interface to a computer. The circuit plugs into the cartridge slot of the computer and receives power from the computer. The circuit includes an analog interface circuit, a read only memory (ROM) containing both a machine language program to drive the analog interface circuit, and a machine language application program. The analog interface circuit includes an analog-to-digital converter, a clock circuit, and a decoder. The circuit of the present invention also includes a tri-state bus interface circuit to communicate the state of input switches to the computer.

US Patent:

52492729, Sep 28, 1993

Filed:

Aug 10, 1990

Appl. No.:

7/565462

Inventors:

David R. Stern - Hinsdale IL

Assignee:

Ambrosia Microcomputer Products, Inc. - Hinsdale IL

International Classification:

G06F 302
G06F 3023
G06F 314
G06F 1132

US Classification:

395275

Abstract:

An interface circuit for use between a radio control transmitter equipped with joysticks and a standard serial input port of a personal type computer. The interface circuitry includes a microcontroller operated as a reformatter for signals received from the remote control transmitter and a transistorized converter circuit connected between the output of the microcontroller and computer to convert the voltage level of signals output from the microcontroller in reformatted form.

US Patent:

51343959, Jul 28, 1992

Filed:

Aug 10, 1990

Appl. No.:

7/565685

Inventors:

David R. Stern - Hinsdale IL

Assignee:

Ambrosia Microcomputer Products, Inc. - Hinsdale IL

International Classification:

H03K 1794

US Classification:

341 20

Abstract:

An interface circuit for use between a control point equipped with joysticks and switches and a standard serial input port of a personal type computer. The interface circuitry includes an analog to digital converter, a microcontroller operated as a reformatter for signals received from the analog to digital converter and a transistorized converter circuit connected between the output of the microcontroller and the serial input of the computer to convert the voltage level of signals output from the microcontroller in reformatted form.