1
David D Sharrit: Vector network analyzer with integral processor. Hewlett Packard Company, Jeffery B Fromm, Joseph H Smith, October 27, 1987: US04703433 (106 worldwide citation)

A precision vector network analyzer which is suitable for a wide range of applications including both laboratory and automated production measurements and testing is disclosed. New measurement capabilities, greater ease of use, and nearly complete automation are provided. Contributions include fully ...


2
William T Pike, David D Sharrit, Barry A Brown: Vector network analyzer for swept frequency harmonic and mixer conversion loss measurements using either an internal or external signal source. Hewlett Packard Company, William C Milks III, February 18, 1992: US05089782 (20 worldwide citation)

A vector network analyzer for performing swept frequency measurements on non-linear RF devices, using either an internal or external signal source. This simplifies and speeds linear and non-linear amplifier and mixer measurements, such as impedance, amplifier gain, and mixer conversion loss, on the ...


3
David D Sharrit: Group delay measurement apparatus and method. Hewlett Packard Company, Patrick J Barrett, July 6, 1976: US03968427 (15 worldwide citation)

A network analyzer which compares a reference signal supplied to a device under test with an output signal from the device under test is used to measure the group delay caused by the device under test. The reference signal is produced by a swept frequency signal generator. During the sweep of the si ...


4
David D Sharrit, Michael J Neering, S Bruce Donecker, Mark D Roos, Wayne C Cannon, John T Barr IV: Vector network analyzer with integral processor. Hewlett Packard Company, Jeffery B Fromm, Joseph H Smith, April 28, 1987: US04661767 (5 worldwide citation)

A precision vector network analyzer which is suitable for a wide range of applications including both laboratory and automated production measurements and testing is disclosed. New measurement capabilities, greater ease of use, and nearly complete automation are provided. Contributions include fully ...


5
David D Sharrit: Method and circuit for generating diamond markers. Hewlett Packard Company, Robert S Hulse, May 30, 1978: US04092567 (5 worldwide citation)

A diamond marker generator circuit generates a diamond-shaped marker making a spot or point on a curve of an input signal being measured.


6
Joseph M Gorin, David D Sharrit: Signal analyzer having independent analysis and display scales. Agilent Technologies, John L Imperato, April 9, 2002: US06370484 (5 worldwide citation)

A signal analyzer has an analysis scale and a display scale that are independently selectable. The signal analyzer receives a first representation of an applied signal and provides from the first representation at least two alternative representations. A first selective input enables a designated on ...


7
David D Sharrit, Robert G Dildine, Mark D Roos, John T Barr IV: Vector network analyzer with integral processor. Hewlett Packard Company, Jeffery B Fromm, Joseph H Smith, January 13, 1987: US04636717 (4 worldwide citation)

A precision vector network analyzer which is suitable for a wide range of applications including both laboratory and automated production measurements and testing is disclosed. New measurement capabilities, greater ease of use, and nearly complete automation are provided. Contributions include fully ...


8
David E Root, David D Sharrit, John Wood: Behavioral model generation. Agilent Technologies, May 1, 2012: US08170854

A model of a device is generated. An input port of the device is stimulated with a large amplitude signal having a central frequency. A first port of the device is perturbed with a small amplitude signal tone. The small amplitude signal tone is at a frequency offset slightly from a harmonic of the c ...


9
David E Root, David D Sharrit, John Wood: Behavioral model generation. Agilent Technologies, Intellectual Property Administration Legal Dept, July 20, 2006: US20060161409-A1

A model of a device is generated. An input port of the device is stimulated with a large amplitude signal having a central frequency. A first port of the device is perturbed with a small amplitude signal tone. The small amplitude signal tone is at a frequency offset slightly from a harmonic of the c ...