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Larry R Lockwood, Kimberly R Gleason, Eric W Strid: Wafer probe. Cascade Microtech, Dellett Smith Hill & Bedell, September 29, 1987: US04697143 (193 worldwide citation)

A wafer probe is provided having metallic transmission lines mounted on a tapered alumina substrate generally surrounded by microwave absorbing material. The probe provides for on-wafer measurements of small planar devices at frequencies from DC to at least 18 GHz with low inductance, and with const ...


2
Xiaofen Chen, Linley F Gumm, Dana E Whitlow, Larry R Lockwood: Measurement test set and method for in-service measurements of phase noise. Tektronix, William K Bucher, June 12, 2001: US06246717 (57 worldwide citation)

A system and method for in-service transmitter phase noise measurements determines phase nonlinearity by way of comparing unfiltered signal samples and regenerated reference signal samples to calculate phase nonlinearity error. Linear distortion is removed from the received signal samples in order t ...


3
Larry R Lockwood: Phase detector. Tektronix, Francis I Gray, March 31, 1987: US04654600 (11 worldwide citation)

A phase detector uses the junction of a coplanar waveguide and a slot line. The coplanar waveguide serves as an input terminal and is contiguous to the slot line which is shorted. A strobe pulse is applied to the shorted slot line via a snap-off diode, and an input signal is passed via sampling diod ...


4
Larry R Lockwood: Dielectric resonator frequency selective network. Tektronix, William A Birdwell, Francis I Gray, March 11, 1986: US04575699 (6 worldwide citation)

A dielectric resonator frequency selective network. A frequency selective network for microwave circuits is provided whereby a dielectric resonator is coupled to associated circuitry by input and output coupling loops formed in a single circuit board. The two loops are closely spaced, but partially ...


5
Leonard A Roland, Larry R Lockwood, H Erwin Grellmann: Broad band, thin film attenuator and method for construction thereof. Tektronix, Francis I Gray, William A Birdwell, June 2, 1987: US04670723 (5 worldwide citation)

A broad band, thin film attenuator for microwave circuits is constructed by placing a ground plane conductor on one side of a ceramic, insulating substrate, and conductive, resistive, and reactive elements on the other side of the substrate. Capacitive stubs are provided to compensate for inductance ...


6
Larry R Lockwood: Low noise oscillator. Tektronix, William A Birdwell, Francis I Gray, April 1, 1986: US04580109 (4 worldwide citation)

A circuit configuration is provided for reducing noise sidebands in the output of an oscillator due to modulation of the oscillation signal by characteristic noise produced by the amplifying element. A gallium arsenide field-effect transistor that produces characteristic noise is operated as a linea ...


7
Larry R Lockwood: Electrostatic discharge testing device. Trisys, Chernoff Vilhauer McClung & Stenzel, June 19, 1990: US04935839 (3 worldwide citation)

An electrostatic discharge testing device employs magnetic reed relays in a switching array for selectively routing high-voltage, fast rise-time signals. The contacts of the reed relays are copper plated to minimize skin effect and thus decrease rise-time. Interposed between the glass enclosure and ...


8
Larry R Lockwood: Electronic filter devices. Tektronix, John Smith Hill, May 22, 1984: US04450422 (1 worldwide citation)

An electronic filter device comprises a high frequency section and a low frequency section. The high frequency section has an input coupling loop connected to an input connection of the filter device, and a gyromagnetic resonance element. The low frequency section comprises at least one inductor and ...


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