Thomas H Davies

US Patent:

41045386, Aug 1, 1978

Filed:

Apr 29, 1977

Appl. No.:

5/792155

Inventors:

Thomas J. Davies - San Jose CA

Assignee:

Fairchild Camera and Instrument Corporation - Mountain View CA

International Classification:

H02J 900

US Classification:

307 64

Abstract:

A digitally synthesized frequency back-up circuit which, after removal or failure of applied A. C. power, will reproduce signals precisely indicative of each zero transition point of the A. C. waveform. A high frequency binary counter continually counts internally generated pulses and at the end of each A. C. period, stores one-half the count, representing 180. degree. , in a storage buffer. When the A. C. fails, the inverted value of the buffer count is loaded into the counter which is incremented by the internally generated pulses to count only up to the value stored in the buffer, at which point the circuit generates an output pulse. As long as the A. C. frequency remains off, the counter will continue to reload from the buffer and count the value representing this 180. degree. period. An additional and separate buffer section in the circuit stores the binary count representing the 90. degree. point in each A. C.

US Patent:

44814321, Nov 6, 1984

Filed:

Jun 7, 1982

Appl. No.:

6/386125

Inventors:

Thomas J. Davies - Gilroy CA

Assignee:

Fairchild Camera & Instrument Corp. - Mountain View CA

International Classification:

H03K 19094
H03K 1920
H03K 17687

US Classification:

307469

Abstract:

A structure and method are provided wherein a single output buffer stage (50) is provided which can be programmed to function either as an open drain output buffer or a CMOS Push-Pull output buffer. The output buffer stage constructed in accordance with this invention is programmed in one of several manners. In one embodiment of this invention, the fabrication steps utilized to program the output buffer are the enhancement and depletion dopings, whereby certain devices of the output buffer are programmed to either remain always turned off or always turned on, thus programming the output buffer to serve either as an open drain output buffer or as a CMOS push-pull output buffer.

US Patent:

44490658, May 15, 1984

Filed:

Oct 2, 1981

Appl. No.:

6/308070

Inventors:

Thomas J. Davies - Gilroy CA

Assignee:

Fairchild Camera & Instrument Corp. - Mountain View CA

International Classification:

H03K 19096
H03K 1920

US Classification:

307473

Abstract:

A simple six-transistor input buffer for generating and applying binary function test signals to associated circuitry in an integrated circuit package. The buffer recognizes three different voltage levels of an input signal that is applied to a single input test pin and generates three corresponding binary output signals that may be used for testing various functions of the associated circuitry.

US Patent:

54522293, Sep 19, 1995

Filed:

Dec 18, 1992

Appl. No.:

7/993711

Inventors:

Kapil Shankar - Fremont CA
Mark A. Moran - San Jose CA
Thomas J. Davies - Portland OR

Assignee:

Lattice Semiconductor Corporation - Santa Clara CA

International Classification:

G06F 1700

US Classification:

364489

Abstract:

A non-volatile, in-system programmable integrated-circuit switch has horizontal conductive lines and vertical conductive lines. A programmable interconnect cell including a floating gate transistor is provided at each intersection of a horizontal line and a vertical line. Each line is connected to a pin through a programmable I/O cell which includes a floating gate transistor. Each I/O cell can be programmed to configure the corresponding pin as an input pin or as an inverting or non-inverting output pin. The I/O cell can also be programmed to tri-state the pin or to fix the pin at a high or low voltage level. Each input pin can be connected to more than one output pins. A TTL-to-CMOS translator in each I/O cell is provided in the output section of the cell to reduce the translator output load and make the load, and hence the speed and power consumption of the switch, less dependent on the switch programming.

US Patent:

40754642, Feb 21, 1978

Filed:

May 2, 1977

Appl. No.:

5/792617

Inventors:

Thomas J. Davies - San Jose CA

Assignee:

Fairchild Camera and Instrument Corporation - Mountain View CA

International Classification:

G06M 314
H03K 2330

US Classification:

235 92EV

Abstract:

A digital circuit for sensing the signal on a data bus, selectively incrementing or decrementing the binary signal and reapplying it to the bus. The circuitry includes a binary counter comprising a temporary storage cell for each bus conductor. The output of each cell controls the conduction through an adjacent portion of a pre-charged conductor which is periodically discharged at the least significant digit cell and which, when charged adjacent a higher order cell, will inhibit the toggling of that cell. All bus lines are pre-charged to a binary "1" at a particular instant followed by the discharge to "0" of those lines whose respective cells contain a binary "0".

US Patent:

44853173, Nov 27, 1984

Filed:

Oct 2, 1981

Appl. No.:

6/308073

Inventors:

Thomas J. Davies - Gilroy CA

Assignee:

Fairchild Camera & Instrument Corp. - Mountain View CA

International Classification:

H03K 19094
H03K 524
H03K 3356
G01R 19165

US Classification:

307475

Abstract:

A CMOS buffer for the dynamic translation of input signals at TTL levels to corresponding signals at CMOS levels. A reference voltage at a level between the 0. 8 volt maximum TTL "0" input level and the 2. 4 volt minimum "1" input level is generated by charge distribution between capacitors. This reference level is compared with an input signal level in a dynamic comparator comprised of a CMOS cross-coupled latch to produce output signals at CMOS levels that correspond to the TTL input signals.

Author:

Thomas J. Davies

ISBN #:

0750601957

Author:

Thomas M. Davies

ISBN #:

0803208340

Author:

Thomas M. Davies

ISBN #:

0803209541

Author:

Thomas M. Davies

ISBN #:

0803221169

Author:

Thomas M. Davies

ISBN #:

0803279000

Author:

Thomas M. Davies

ISBN #:

0803279280

Author:

Thomas M. Davies

ISBN #:

0842026096

Author:

Thomas M. Davies

ISBN #:

0842026118