David A Fiori

US Patent:

20080002275, Jan 3, 2008

Filed:

Jun 28, 2006

Appl. No.:

11/478391

Inventors:

David Fiori - Bensalem PA, US

International Classification:

G11B 21/02

US Classification:

360 75

Abstract:

An auxiliary interface device, comprising an electronic circuit to interface to the signal output of a signal source, said signal source developing or receiving more than one signal, and providing for the user selection of at least one of the signals in deference to the others so that said apparatus provides for the selection of at least one special signal having predetermined characteristics, a detector which recognizes the presence of the at least one said special signal when present or part of a signal developed by the apparatus to which said auxiliary interface device is connected, said detector being able to distinguish between said at least one special signal and other signals ordinarily present or developed by the apparatus to which said auxiliary interface device is interfaced, a signal switch to substitute at least one auxiliary signal in place of a signal output by the apparatus to which said auxiliary interface is interfaced, said signal switch being configured to substitute said at least one auxiliary signal for the signal normally developed by said apparatus to which said auxiliary interface device is interfaced when said detector recognizes the presence of the at least one special signal in the signal normally developed by said apparatus to which said auxiliary interface device is interfaced.

US Patent:

56940815, Dec 2, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/448383

Inventors:

David Fiori - Yardley PA

International Classification:

H03F 345

US Classification:

330 69

Abstract:

A signal conditioning system that receives inputs from at least one pair of conductors connected to its input. Each such input is processed by an input filter and presented to a buffer amplifier. Each such input filter and buffer amplifier refers to and is powered by independent power sources whose power return reference potentials are independently determined by the potential of the corresponding input signal potential reference conductor for the signal frequencies of interest. The outputs of all such buffer amplifiers, the power return reference potentials, and the power return reference potential of the conditioning circuit output are all appropriately added or subtracted in the next circuit stage. This circuit stage consists of an amplifier buffer having low output impedance which is powered by another independent power source whose power return reference potential is independently determined by the potential of the output signal reference conductor. The output of this circuit stage is connected to an output inductor circuit which in turn drives the output signal conductor.

US Patent:

RE371300, Apr 10, 2001

Filed:

Nov 13, 1998

Appl. No.:

9/192160

Inventors:

David Fiori - Yardley PA

International Classification:

H03F 345

US Classification:

330 69

Abstract:

A signal conditioning system that receives inputs from at least one pair of conductors connected to its input. Each such input is processed by an input filter and presented to a buffer amplifier. Each such input filter and buffer amplifier refers to and is powered by independent power sources whose power return reference potentials are independently determined by the potential of the corresponding input signal potential reference conductor for the signal frequencies of interest. The outputs of all such buffer amplifiers, the power return reference potentials, and the power return reference potential of the conditioning circuit output are all appropriately added or subtracted in the next circuit stage. This circuit stage consists of an amplifier buffer having low output impedance which is powered by another independent power source whose power return reference potential is independently determined by the potential of the output signal reference conductor. The output of this circuit stage is connected to an output inductor circuit which in turn drives the output signal conductor.

US Patent:

47092246, Nov 24, 1987

Filed:

Nov 6, 1986

Appl. No.:

6/925022

Inventors:

David Fiori - Yardley PA

International Classification:

H03M 182

US Classification:

340347DA

Abstract:

A digital-to-analog converter which develops an analog output representative of the difference between two digital inputs represented by the rates of two series of pulses. A prescribed number of pulses of each series is counted to develop two oppositely directed counter pulses, each having a duration dependent upon the time required to count the prescribed number of pulses. The counter pulses are integrated and the integration signal is sampled at the mid-point of each rise and decay. The average of the samples of each rise and decay represents the difference between the rates of the two series of input pulses.

US Patent:

54365937, Jul 25, 1995

Filed:

Apr 28, 1994

Appl. No.:

8/234343

Inventors:

David Fiori - Yardley PA

International Classification:

H03F 345

US Classification:

330 69

Abstract:

A signal conditioning circuit that receives inputs from at least one pair of conductors connected to its input. Each such input is processed by an input filter and presented to a buffer amplifier. Each such input filter and buffer amplifier refers to and is powered by independent power sources whose power return reference potentials are independently determined by the potential of the corresponding input signal potential reference conductor for the signal frequencies of interest. The outputs of all such buffer amplifiers, the power return reference potentials, and the power return reference potential of the conditioning circuit output are all appropriately added or subtracted in the next circuit stage. This circuit stage consists of an amplifier buffer having low output impedance which is powered by another independent power source whose power return reference potential is independently determined by the potential of the output signal reference conductor. The output of this circuit stage is connected to an output inductor circuit which in turn drives the output signal conductor.

US Patent:

45039224, Mar 12, 1985

Filed:

May 26, 1983

Appl. No.:

6/498536

Inventors:

Amnon Brosh - Montvale NJ
David Fiori - Yardley PA

Assignee:

Bitronics, Inc. - Montvale NJ

International Classification:

G01G 314
G01G 316

US Classification:

177210EM

Abstract:

An electronic bathroom scale employs a low profile planar coil position sensor which responds to the positioning of a pivotable lever system. The levers are coupled to a platform which moves in the vertical direction as a weight is placed upon the top or supporting platform of the scale. The sensor provides variable amplitude or frequency proportional to the weight on the scale. The output signal is processed so that a direct reading of the weight is displayed by means of a digital display. The circuitry described serves to compensate for the nonlinearity of the transducer while further providing other compensation to eliminate environmental effects such as temperature and other factors from affecting the direct display of weight.

US Patent:

46635890, May 5, 1987

Filed:

Jan 29, 1986

Appl. No.:

6/821982

Inventors:

David Fiori - Yardley PA

Assignee:

Sensor Technologies, Inc. - Bensalem PA

International Classification:

G01B 714

US Classification:

324208

Abstract:

Non-contacting sensor apparatus having two tank circuits from which an indication of the position of the moving part of the sensor is developed by measuring the relative resonance frequencies of the two tank circuits. As the moving part of the sensor changes position, the relative resonance frequencies of the two tank circuits change. The outputs of the two tank circuits are multiplexed and drive a pulse generator which develops a first series of pulses having a repetition rate which corresponds to the resonance frequency of one of the tank circuits and a second series of pulses having a repetition rate which corresponds to the resonance frequency of the other tank circuit. The relative times required to count the same number of pulses of each series of pulses provides an indication of the position of the moving part of the sensor.

US Patent:

56640226, Sep 2, 1997

Filed:

Jan 6, 1994

Appl. No.:

8/178099

Inventors:

David Fiori - Yardley PA

International Classification:

G01R 3102

US Classification:

381 941

Abstract:

Noise gate control circuitry eliminates in audio systems the effects of spurious signals on a transducer of a speaker. The noise gate control circuitry coordinates the electronic switching of the transducer to power sources in accordance with a remote turn on control signal, and coordinates this action with the application of power to power sources and signal processing circuitry via remote turn on provisions. The noise gate control circuitry senses and responds to the signals and rapidly connects and disconnects the transducer when the signal level drops to a level too low to be of any good effect. The effect of signal level on delays is removed to provide for suppressing undesirable changes in response.