Inventor
FRIEND DAVID M
US22 patents
⚠️ This page may combine multiple inventors who share the name “FRIEND DAVID M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
18 patentsUS9467092B1Oct 11, 2016
Phased locked loop with multiple voltage controlled oscillators
IBM12 citations84
US8917126B1Dec 23, 2014
Charge pump operating voltage range control using dynamic biasing
IBM14 citations83
US6437602B1Aug 20, 2002
Fully dynamic logic network circuits
IBM15 citations82
US10088519B1Oct 2, 2018
Electromigration monitor
IBM2 citations72
US9882552B2Jan 30, 2018
Low power amplifier
IBM3 citations72
US10250267B2Apr 2, 2019
Differential phase-frequency detector
IBM1 citations62
US9571109B2Feb 14, 2017
Voltage controlled oscillator runaway prevention
IBM1 citations62
US12500581B2Dec 16, 2025
Multi-phase clock generation circuit with digital calibration
IBM0 citations60
US10804905B2Oct 13, 2020
Using a burn-in operational amplifier for a phased locked loop regulator
IBM0 citations51
US9929722B1Mar 27, 2018
Wire capacitor for transmitting AC signals
IBM1 citations51
US9923565B2Mar 20, 2018
Differential phase-frequency detector
IBM1 citations51
US9871527B2Jan 16, 2018
Phase locked loop with sense amplifier circuitry
IBM0 citations51
US9455730B1Sep 27, 2016
Voltage controlled oscillator runaway prevention
IBM0 citations51
US9391623B1Jul 12, 2016
Voltage controlled oscillator runaway prevention
IBM1 citations51
US9059660B1Jun 16, 2015
Variable frequency oscillator with specialized inverter stages
IBM1 citations51
US8994117B2Mar 31, 2015
Moat construction to reduce noise coupling to a quiet supply
IBM1 citations49
US10326450B2Jun 18, 2019
Implementing cascade level shifter for analog voltage
IBM0 citations40
US10116260B2Oct 30, 2018
VCO selection and amplitude management using center tap inductor
IBM0 citations40