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Class Information
Number: 331/20
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means > With reference oscillator or source > T.v. sync type
Description: Subject matter wherein the oscillator system is of the type peculiarly adapted for use in television systems (e.g., vertical or horizontal sweep generators), the reference source comprising synchronizing pulses (usually of short duration) which pulses are compared with signals representative of the generated waves of the controlled oscillator in a phase comparison means, the resulting control or error signal from the comparison means being utilized to adjust the frequency of the controlled oscillator to restore it to the desired relationship with reference frequency.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7443920 |
Frame-based carrier frequency and phase recovery system and method |
Oct. 28, 2008 |
| 7251465 |
Method and apparatus for producing mobile radio signals |
Jul. 31, 2007 |
| 6958771 |
Image processing apparatus working in response to frequency diffused clock as reference input image signals |
Oct. 25, 2005 |
| 6839092 |
Feed forward error correction in video decoder |
Jan. 4, 2005 |
| 6768385 |
Intelligent phase lock loop |
Jul. 27, 2004 |
| 6525614 |
Voltage boost system having feedback control |
Feb. 25, 2003 |
| 6479978 |
High-resolution measurement of phase shifts in high frequency phase modulators |
Nov. 12, 2002 |
| 6433837 |
Demodulator, particularly for a SECAM chrominance signal, with double frequency adjustment |
Aug. 13, 2002 |
| 6396545 |
Method for digital synchronization of video signals |
May. 28, 2002 |
| 6392641 |
PLL circuit for digital display apparatus |
May. 21, 2002 |
| 6323910 |
Method and apparatus for producing high-fidelity images by synchronous phase coherent digital image acquisition |
Nov. 27, 2001 |
| 6317005 |
Process of clock recovery during the sampling of digital-type signals |
Nov. 13, 2001 |
| 6310653 |
Phase comparison and phase adjustment for synchronization to a reference signal that is asynchronous with respect to a digital sampling clock |
Oct. 30, 2001 |
| 6246292 |
Phase lock loop circuit with automatic selection of oscillation circuit characteristics |
Jun. 12, 2001 |
| 6229401 |
Horizontal frequency generation |
May. 8, 2001 |
| 6222590 |
Phase-locked loop circuit |
Apr. 24, 2001 |
| 6194971 |
Method and apparatus for phase shifting a controlled oscillator and applications thereof |
Feb. 27, 2001 |
| 6177959 |
Circuit and method for generating a clock signal synchronized with time reference signals associated with television signals |
Jan. 23, 2001 |
| 6140881 |
Display apparatus with a circuit for controlling the input voltage of PLL according to display mode and method |
Oct. 31, 2000 |
| 6008859 |
Image data processing apparatus |
Dec. 28, 1999 |
| 6005357 |
Vertical oscillation circuit for display device |
Dec. 21, 1999 |
| 5982239 |
Phase locked loop circuit and a picture reproducing device |
Nov. 9, 1999 |
| 5977836 |
Method and apparatus for controlling an output frequency of a phase locked loop |
Nov. 2, 1999 |
| 5959682 |
Data segment sync detection circuit and method thereof |
Sep. 28, 1999 |
| 5815214 |
Oscillatory signal generator arrangement |
Sep. 29, 1998 |
| 5777520 |
Horizontal oscillation circuit capable of changing frequency |
Jul. 7, 1998 |
| 5745314 |
Clock generating circuit by using the phase difference between a burst signal and the oscillation signal |
Apr. 28, 1998 |
| 5719532 |
Horizontal lock detector |
Feb. 17, 1998 |
| 5712532 |
Scalable CRT display device and phase synchronous circuit for use in display device |
Jan. 27, 1998 |
| 5703656 |
Digital phase error detector for locking to color subcarrier of video signals |
Dec. 30, 1997 |
| 5663688 |
Method of enhancing the noise immunity of a phase-locked loop, and device implementing this method |
Sep. 2, 1997 |
| 5638131 |
Method to synchronize video modulation using a constant time base |
Jun. 10, 1997 |
| 5614870 |
Phase lock loop with idle mode of operation during vertical blanking |
Mar. 25, 1997 |
| 5608355 |
Automatic adjustment circuit for an oscillator |
Mar. 4, 1997 |
| 5604808 |
FM signal processor |
Feb. 18, 1997 |
| 5574406 |
Phase lock loop with error measurement and correction in alternate periods |
Nov. 12, 1996 |
| 5541556 |
Clock recovery circuit for serial digital video |
Jul. 30, 1996 |
| 5539357 |
Phase locked loop |
Jul. 23, 1996 |
| 5537613 |
Device and method for detecting pilot signal for two-carrier sound multiplexing system |
Jul. 16, 1996 |
| 5506627 |
Phase locked loop chain for locking audio sampling to serial digital component vide timing |
Apr. 9, 1996 |
| 5486866 |
Oscillator free run frequency setting by data bus control |
Jan. 23, 1996 |
| 5479137 |
Controlled oscillator, as for synchyronous video detector |
Dec. 26, 1995 |
| 5467399 |
Coherent signal generation in digital radio receiver |
Nov. 14, 1995 |
| 5450137 |
Signal processing apparatus |
Sep. 12, 1995 |
| 5426397 |
Phase detector for a phase-lock-loop |
Jun. 20, 1995 |
| 5424689 |
Filtering device for use in a phase locked loop controller |
Jun. 13, 1995 |
| 5404173 |
Method to synchronize video modulation using a constant time base |
Apr. 4, 1995 |
| 5404405 |
FM stereo decoder and method using digital signal processing |
Apr. 4, 1995 |
| 5357574 |
Coherent signal generation in digital radio receiver |
Oct. 18, 1994 |
| 5337023 |
Reduced phase-jitter horizontal sweep control phase-lock-loop and method |
Aug. 9, 1994 |
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