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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5150386 Clock multiplier/jitter attenuatorExpiredFeb 09, 89Sep 22, 92[H04L]
5111451 Method and apparatus for synchronizing an optical transceiver over a full duplex data communication channelExpiredOct 27, 89May 05, 92[H04J]
5088107 Linear channel bandwidth calibration circuitExpiredOct 27, 89Feb 11, 92[H04L, H04B]
5079550 Combining continuous time and discrete time signal processing in a delta-sigma modulatorExpiredOct 27, 89Jan 07, 92[H03M]
5068660 Combining fully-differential and single-ended signal processing in a delta-sigma modulatorExpiredOct 27, 89Nov 26, 91[H03M]
5039989 Delta-sigma analog-to-digital converter with chopper stabilization at the sampling frequencyExpiredOct 27, 89Aug 13, 91[H03M]
5012244 Delta-sigma modulator with oscillation detect and reset circuitExpiredOct 27, 89Apr 30, 91[H03M]
4988954 Low power output stage circuitry in an amplifierExpiredApr 28, 89Jan 29, 91[H03F]
4941156 Linear jitter attenuatorExpiredMar 22, 89Jul 10, 90[H04L]
4939516 Chopper stabilized delta-sigma analog-to-digital converterExpiredJun 13, 88Jul 03, 90[H03M]
4918454 Compensated capacitors for switched capacitor input of an analog-to-digital converterExpiredOct 13, 88Apr 17, 90[H03M]
4877555 Conductor composition and method of manufacturing a ceramic multilayer structure using the sameExpiredApr 13, 88Oct 31, 89[H01B]
4851841 Gain scaling of oversampled analog-to-digital convertersExpiredOct 02, 87Jul 25, 89[H03M]
4849662 Switched-capacitor filter having digitally-programmable capacitive elementExpiredApr 14, 86Jul 18, 89[H03H]
4804863 Method and circuitry for generating reference voltagesExpiredNov 12, 86Feb 14, 89[H03K]
4805198 Clock multiplier/jitter attenuatorExpiredMay 19, 87Feb 14, 89[H04L]
4748418 Quasi auto-zero circuit for sampling amplifiersExpiredNov 12, 86May 31, 88[H03K, H03F]
4746899 Method for reducing effects of electrical noise in an analog-to-digital converterExpiredOct 07, 86May 24, 88[H03M]
4709225 Self-calibration method for capacitors in a monolithic integrated circuitExpiredDec 16, 85Nov 24, 87[H03M]

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