Patents by Inventor Fred Mirow

Fred Mirow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160268970
    Abstract: A sensor system on an oscillator having variable loop gain level is described. Only when the oscillator loop gain is at least the level of one does the oscillator produce an AC output signal. The oscillator's ability to oscillate is controlled by the one or more sensor/transducer input signal levels which controls the Q level of an element in a resonate circuit which with other components forms a feedback network.
    Type: Application
    Filed: March 9, 2016
    Publication date: September 15, 2016
    Inventor: Fred Mirow
  • Patent number: 9140579
    Abstract: A low power inductive proximity sensing system in which a DC voltage to the inductors is only applied for a short time period needed to detect the presence or absence of an appropriate object. After the detection time period is over, DC voltage is no longer applied to the inductors.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 22, 2015
    Inventor: Fred Mirow
  • Publication number: 20150084646
    Abstract: A low power inductive proximity sensing system in which a DC voltage to the inductors is only applied for a short time period needed to detect the presence or absence of an appropriate object. After the detection time period is over, DC voltage is no longer applied to the inductors.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Inventor: Fred Mirow
  • Patent number: 8098107
    Abstract: A system for providing voltage and current regulator sources based on a oscillator having variable loop gain is described. Only when the oscillator loop gain is at least the value of one does the oscillator oscillate. The oscillator's ability to oscillate is controlled by the one or more variable impedance or gain devices. Negative feedback of the voltage or current output level is used to control the loop gain of the oscillator circuit.
    Type: Grant
    Filed: September 5, 2009
    Date of Patent: January 17, 2012
    Inventor: Fred Mirow
  • Publication number: 20100277223
    Abstract: Voltage and current reference sources capable of providing an output signal level which is insensitive to temperature variations, radiation, and to variations in the input voltage supplied to the reference circuit. The reference output level is used to vary the temperature of at least one resistor that is in a resistor bridge network. By applying resistor temperature variation as negative feedback the voltage and current reference sources output voltage level is maintained at a relatively constant level.
    Type: Application
    Filed: March 24, 2010
    Publication date: November 4, 2010
    Inventor: Fred Mirow
  • Patent number: 7719259
    Abstract: A current sensor system that uses a sensor resistor to sense current flow and in which the level of voltage drop across that resistor is used to control the current flow through another resistor, the input resistor, into a current integrator. The ratio of input resistor to sensor resistor resistance values determines the ratio of sense current to integrator input current level. By matching the temperature coefficients of the resistors the effects of temperature are reduced. The integrator output provides either directly or indirectly a voltage level, frequency, or duty cycle output signal to indicate the sensor resistor current level.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: May 18, 2010
    Inventor: Fred Mirow
  • Publication number: 20100060371
    Abstract: A system for providing voltage and current regulator sources based on a oscillator having variable loop gain is described. Only when the oscillator loop gain is at least the value of one does the oscillator oscillate. The oscillator's ability to oscillate is controlled by the one or more variable impedance or gain devices. Negative feedback of the voltage or current output level is used to control the loop gain of the oscillator circuit.
    Type: Application
    Filed: September 5, 2009
    Publication date: March 11, 2010
    Inventor: Fred Mirow
  • Patent number: 7545181
    Abstract: A method for comparing two signal with increased accuracy by using a reduced offset voltage comparator that has a offset zero mode and amplify mode. Additional comparators are used to indicate when the two signal are close in value. When the signal are close the reduced offset voltage comparator operation is changed from offset zero mode to amplify mode and the two signal are compared.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: June 9, 2009
    Inventor: Fred Mirow
  • Patent number: 7504901
    Abstract: A FET oscillator with increased frequency stability. This is accomplished by using a controlled voltage supply with error correction to power the amplifier stage of the oscillator. This voltage changes as the oscillator temperature increases in order to reduce the variation in frequency, caused by the amplifier and other frequency determining components changes. By using this compensated amplifier as the active section of an oscillator, the oscillator frequency stability is increased.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: March 17, 2009
    Inventor: Fred Mirow
  • Publication number: 20090045801
    Abstract: A current sensor system that uses a sensor resistor to sense current flow and in which the level of voltage drop across that resistor is used to control the current flow through another resistor, the input resistor, into a current integrator. The ratio of input resistor to sensor resistor resistance values determines the ratio of sense current to integrator input current level. By matching the temperature coefficients of the resistors the effects of temperature are reduced. The integrator output provides either directly or indirectly a voltage level, frequency, or duty cycle output signal to indicate the sensor resistor current level.
    Type: Application
    Filed: April 3, 2008
    Publication date: February 19, 2009
    Inventor: Fred Mirow
  • Patent number: 7466178
    Abstract: This invention relates to monostable and astable multivibrators in which the pulse width or frequency stability, respectively is increased by reducing the effect of the comparator input offset voltage. The reduction is accomplished by alternately reversing the input connections to the comparator.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: December 16, 2008
    Inventor: Fred Mirow
  • Patent number: 7456700
    Abstract: A system for comparing, measuring, or providing a reference signal based on a oscillator having variable loop gain is described. Only when the oscillator loop gain is at least the value of one does the oscillator produce an AC output signal. The oscillator's ability to oscillate is controlled by the one or more sensor/transducer input signal levels. In some cases, negative feedback of the AC output signal is also used to control the loop gain of the oscillator circuit keeping the loop gain at or close to the value of one. The system's output signal indicates whether the oscillator is oscillating or not, or the AC signal level required to just maintain oscillation.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: November 25, 2008
    Inventor: Fred Mirow
  • Publication number: 20070252656
    Abstract: A system for comparing, measuring, or providing a reference signal based on a oscillator having variable loop gain is described. Only when the oscillator loop gain is at least the value of one does the oscillator produce an AC output signal. The oscillator's ability to oscillate is controlled by the one or more sensor/transducer input signal levels. In some cases, negative feedback of the AC output signal is also used to control the loop gain of the oscillator circuit keeping the loop gain at or close to the value of one. The system's output signal indicates whether the oscillator is oscillating or not, or the AC signal level required to just maintain oscillation.
    Type: Application
    Filed: April 12, 2007
    Publication date: November 1, 2007
    Inventor: Fred Mirow
  • Publication number: 20070241831
    Abstract: A FET oscillator with increased frequency stability. This is accomplished by using a controlled voltage supply with error correction to power the amplifier stage of the oscillator. This voltage changes as the oscillator temperature increases in order to reduce the variation in frequency, caused by the amplifier and other frequency determining components changes. By using this compensated amplifier as the active section of an oscillator, the oscillator frequency stability is increased.
    Type: Application
    Filed: January 20, 2006
    Publication date: October 18, 2007
    Inventor: Fred Mirow
  • Publication number: 20070152717
    Abstract: A method for comparing two signal with increased accuracy by using a reduced offset voltage comparator that has a offset zero mode and amplify mode. Additional comparators are used to indicate when the two signal are close in value. When the signal are close the reduced offset voltage comparator operation is changed from offset zero mode to amplify mode and the two signal are compared.
    Type: Application
    Filed: November 24, 2006
    Publication date: July 5, 2007
    Inventor: Fred Mirow
  • Publication number: 20060181360
    Abstract: This invention relates to monostable and astable multivibrators in which the pulse width or frequency stability, respectively is increased by reducing the effect of the comparator input offset voltage. The reduction is accomplished by alternately reversing the input connections to the comparator.
    Type: Application
    Filed: December 12, 2005
    Publication date: August 17, 2006
    Inventor: Fred Mirow
  • Patent number: 6281732
    Abstract: The object of this invention are bistable, monostable and astable multivibrator in which the switching transition level is stable and relatively independent of ambient temperature. This reduction is accomplished by using an auto-zero amplifier system with an input offset voltage of substantially zero volts.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: August 28, 2001
    Inventor: Fred Mirow
  • Patent number: 5459438
    Abstract: This invention relates to oscillators employing a primary feedback network and a high pass filter feedback network. The feedback networks are connected between the input and output of a of a high signal gain amplifier system. The primary feedback network provides positive feedback to cause oscillation to occur and also determines the nominal frequency of oscillation. The high pass filter feedback network provides a negative feedback signal that controls the rise and fall time of the amplifier system's output signal. By varying the output signal's rise and fall time the frequency of oscillation is also changed. The high signal gain amplifier system operates with one or more amplifier stages in the non-linear region to produce a significantly distorted sine wave or pulse output signal.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: October 17, 1995
    Inventor: Fred Mirow
  • Patent number: 5359303
    Abstract: A Field Effect Transistor (FET) signal delay system with increased propagation delay time stability. This is accomplished by using a controlled voltage supply to power the amplifier stage. This voltage changes as the FET amplifier temperature increases in order to reduce the variation in propagation delay time, caused by the amplifier's gain and phase shift changes. By using this compensated amplifier as the delay element of a signal delay system, the propagation delay time stability is increased.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: October 25, 1994
    Inventor: Fred Mirow
  • Patent number: 5241286
    Abstract: A FET oscillator with increased frequency stability. This is accomplished by using a controlled voltage supply to power the amplifier stage of the oscillator. This voltage changes as the FET amplifier temperature increases in order to reduce the variation in frequency, caused by the amplifier's gain and phase shift changes. By using this compensated amplifier as the active section of an oscillator, the oscillator frequency stability is increased.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: August 31, 1993
    Inventor: Fred Mirow