Inventor
SGRIGNOLI GARY J
US37 patents
⚠️ This page may combine multiple inventors who share the name “SGRIGNOLI GARY J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ZENITH ELECTRONICS CORP
36 patentsUS5087975AFeb 11, 1992
VSB HDTV transmission system with reduced NTSC co-channel interference
ZENITH ELECTRONICS CORP278 citations99
US5598220AJan 28, 1997
Digital signal with multilevel symbols and sync recognition
ZENITH ELECTRONICS CORP57 citations96
US5565932AOct 15, 1996
AGC system with pilot using digital data reference
ZENITH ELECTRONICS CORP84 citations96
US5410368AApr 25, 1995
Carrier acquisition by applying substitute pilot to a synchronous demodulator during a start up interval
ZENITH ELECTRONICS CORP45 citations96
US5181112AJan 19, 1993
Television signal transmission system with carrier offset compensation
ZENITH ELECTRONICS CORP63 citations95
US4771458ASep 13, 1988
Secure data packet transmission system and method
ZENITH ELECTRONICS CORP90 citations95
US5574509ANov 12, 1996
Antenna orientation system for digital TV receiver
ZENITH ELECTRONICS CORP35 citations93
US6069524AMay 30, 2000
FPLL with third multiplier in an analog input signal
ZENITH ELECTRONICS CORP36 citations92
US5821988AOct 13, 1998
NTSC co-channel interference reduction system
ZENITH ELECTRONICS CORP48 citations92
US5638140AJun 10, 1997
FPLL having AFC filter with limited phase shift
ZENITH ELECTRONICS CORP22 citations92
US5594496AJan 14, 1997
Detection of co-channel interference in digital television signals
ZENITH ELECTRONICS CORP38 citations92
US5416524AMay 16, 1995
Digital television synchronization system and method
ZENITH ELECTRONICS CORP27 citations92
US5329319AJul 12, 1994
Stabilized frequency and phase locked loop with saw devices on common substrate
ZENITH ELECTRONICS CORP34 citations92
US5260793ANov 9, 1993
Receiver post coder selection circuit
ZENITH ELECTRONICS CORP29 citations92
US6166594ADec 26, 2000
Self calibrating demodulator system
ZENITH ELECTRONICS CORP19 citations84
US4790010ADec 6, 1988
Enhanced scrambling method and system for TV signals
ZENITH ELECTRONICS CORP20 citations82
US4586078AApr 29, 1986
CATV upstream signal transmission at nonharmonic video frequencies
ZENITH ELECTRONICS CORP21 citations82
US7313208B2Dec 25, 2007
Pre-equalization for low-cost DTV translators
ZENITH ELECTRONICS CORP13 citations81
US5699011ADec 16, 1997
DC offset compensation method and apparatus
ZENITH ELECTRONICS CORP10 citations74
US5642154AJun 24, 1997
Cable maintenance system
ZENITH ELECTRONICS CORP9 citations74
US5121208AJun 9, 1992
Method and apparatus for reducing co-channel interference in an HDTV receiver
ZENITH ELECTRONICS CORP12 citations74
US4939790AJul 3, 1990
PLL frequency stabilization in data packet receivers
ZENITH ELECTRONICS CORP8 citations74
US4885794ADec 5, 1989
Method and apparatus for protection of channel access in broadband cable communications systems
ZENITH ELECTRONICS CORP8 citations74
US4755762AJul 5, 1988
Combined FPLL and PSK data detector
ZENITH ELECTRONICS CORP7 citations74
US4706284ANov 10, 1987
Television signal data transmission system
ZENITH ELECTRONICS CORP7 citations74
US4653071AMar 24, 1987
Carrier recovery circuit for PSK communication system
ZENITH ELECTRONICS CORP8 citations74
US5627604AMay 6, 1997
Stabilizing the lock up of a bi-phase stable FPLL by augmenting a recovered DC pilot
ZENITH ELECTRONICS CORP11 citations73
US5546138AAug 13, 1996
AGC system with overriding, maximum gain during an initial interval to enhance signal acquisition
ZENITH ELECTRONICS CORP12 citations73
US4876718AOct 24, 1989
Secure data packet transmission system and method
ZENITH ELECTRONICS CORP16 citations73
US6295015B1Sep 25, 2001
Reference generator for demodulator calibration
ZENITH ELECTRONICS CORP9 citations71
US4817144AMar 28, 1989
Secure TV scrambling system using framing code switching
ZENITH ELECTRONICS CORP16 citations71
USRE36992EDec 19, 2000
VSB HDTV transmission system with reduced NTSC co-channel interference
ZENITH ELECTRONICS CORP4 citations63
US5675284AOct 7, 1997
Frequency lock indicator for FPLL demodulated signal having a pilot
ZENITH ELECTRONICS CORP5 citations63
US5668498ASep 16, 1997
Controlling FPLL polarity using pilot signal and polarity inverter
ZENITH ELECTRONICS CORP2 citations63
US4706283ANov 10, 1987
Television signal scrambling system
ZENITH ELECTRONICS CORP4 citations63
US5675283AOct 7, 1997
Pilot recovery and polarity detection system
ZENITH ELECTRONICS CORP1 citations52