Inventor · Cambridge, MA, US

Michael H. Perrott

80Patents
18h-index
44Co-inventors
84Inventor score

Filing activity: Jan 31, 1997 → Mar 31, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US6008703A Digital compensation for wideband modulation of a phase locked loop frequency synthesizer Electricity 311 Expired
US6657488B1 Offset correction and slicing level adjustment for amplifier circuits Electricity 48 Expired
US10315222B2 Two-dimensional array of CMOS control elements Electricity 42 Active
US6630868B2 Digitally-synthesized loop filter circuit particularly useful for a phase locked loop Electricity 40 Expired
US6741109B1 Method and apparatus for switching between input clocks in a phase-locked loop Electricity 38 Expired
US10600403B2 Transmit operation of an ultrasonic sensor Physics 35 Active
US10539539B2 Operation of an ultrasonic sensor Physics 32 Active
US10706835B2 Transmit beamforming of a two-dimensional array of ultrasonic transducers Performing Operations; Transporting 31 Active
US6590426B2 Digital phase detector circuit and method therefor Electricity 29 Expired
US6580376B2 Apparatus and method for decimating a digital input signal Electricity 26 Expired
US6831523B1 Auto-detection between referenceless and reference clock mode of operation Electricity 24 Expired
US8138843B2 Gated ring oscillator for a time-to-digital converter with shaped quantization noise Electricity 24 Active
US6765445B2 Digitally-synthesized loop filter circuit particularly useful for a phase locked loop Electricity 24 Expired
US6988227B1 Method and apparatus for bit error rate detection Electricity 23 Expired
US8299826B2 Phase locked loop circuitry having switched resistor loop filter circuitry, and methods of operating same Electricity 23 Active
US6856206B1 Method and apparatus for acquiring a frequency without a reference clock Emerging Cross-Sectional Technologies 21 Expired
US9246500B2 Time-to-voltage converter using a capacitor based digital to analog converter for quantization noise cancellation Electricity 20 Active
US7133485B1 Feedback system incorporating slow digital switching for glitch-free state changes Electricity 19 Expired
US9490818B2 Cancellation of delta-sigma quantization noise within a fractional-N PLL with a nonlinear time-to-digital converter Electricity 18 Active
US6686803B1 Integrated circuit incorporating circuitry for determining which of at least two possible frequencies is present on an externally provided reference signal and method therefor Electricity 17 Expired
US10325915B2 Two-dimensional array of CMOS control elements Electricity 17 Active
US9762250B2 Cancellation of spurious tones within a phase-locked loop with a time-to-digital converter Electricity 16 Active
US9182295B1 Circuitry and techniques for resistor-based temperature sensing Physics 15 Active
US7593644B2 Synchronization of lasers and RF sources using timing information transfer in the optical domain Electricity 12 Active
US9705514B2 Hybrid analog and digital control of oscillator frequency Electricity 11 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.