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Sync Circuits
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Last Updated on: Wednesday, April 18, 2012 08:27 AM


Circuits Designed by Dave Johnson, P.E.

  • Fully Isolated 50/60Hz Sync Generator
    This circuit will produce a single pulse at the zero voltage cross points of the power line voltage.  An opto-coupler provides a very safe 5KV isolation.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1.5A High Efficiency Synchronous Switching Regulator Evaluation Board -   evaluation board is designed to supply 3.3V at 15 mA up to 1.5A.  input voltage range is 4V to 14V. Components were selected based on  design procedure in  LM2651 datasheet. PCB layout is critical to reduce noise and ensure…. (app note added 3/05)
2 AA cells power step-down regulator -  01/07/99 Issue of EDN  DC/DC conversion is particularly challenging when both the input and output voltages are low. Step-up ICs that operate with inputs lower than 1V are available, but step-down ICs that accept input voltages....Page includes several designs.  Scroll to find this one.... [Design Idea by Len Sherman, Maxim Integrated Products, Sunnyvale, CA]
AN-1082: Adjust or Synchronize LM2586/88 Switching Frequency -  National Semiconductor Application Note....[App Note]
AN-1133: LM2653EVAL 1.5A Synchronous Switching Regulator Evaluation Board -  National Semiconductor Application Note....[App Note]
AN-1215: LM2655 2.5A Synchronous Switching Regulator Evaluation Board -  National Semiconductor Application Note....[App Note]

AN-252: Using the AD2S80 Series Resolver to Digital Converters with Synchro's; Solid State Scott-T Circuit. -  AN-252 Analog Devices Application Notes....[App Note]
AN-391: The LM1823: A High Quality TV Video I.F. Amplifier & Synchronous Detector for Cable Receivers -  National Semiconductor Application Note....[App Note]
AN-587: Synchronizing Multiple AD9850/AD9851 DDS-Based Synthesizers  -  AN-587-Analog Device Application Notes....[App Note]  
AN-605: Synchronizing Multiple AD9852 DDS-Based Synthesizers  -  AN-605-Analog Device Application Notes....[App Note]  
Circuit for Generating Composite Sync from Composite Video -  (electronic schematic / circuit added 4/02)
Digital sync-tip clamping: a new approach to video-signal conditioning -  10/08/98 EDN-Design Idea  In digital sync-tip clamping, a stand-alone "clamping" ADC (CADC] incorporates the dc-restore function at its input and eliminates the need for external timing strobes.  This technique encompasses a complete front-end architecture, including sync detection and automatic gain control (AGC] and provides.... [Design Idea by Lazar Shifrin, Advanced Imaging Solutions]
Fully Isolated 50/60Hz Sync Generator -  This circuit will produce a single pulse at the zero voltage cross points of the power line voltage.  An opto-coupler provides a very safe 5KV isolation.  (added 12/04) …. [Designed by David A. Johnson]
LM2655 2.5A Synchronous Switching Regulator Evaluation Board -  National Semiconductor Application Note....[App Note]
Locked sync sine generator covers three decades with low-distortion -  18-Sep-08 Issue of EDN This sine-wave generator can synchronize a sine-wave output through three decades of frequency and maintain low THD and constant amplitude.... [Design Idea by Alfredo H Saab and Tina Alikahi, Maxim Integrated Products, Sunnyvale, CA]
LT1399/LT1399HV Triple 300MHz Current Feedback Amplifiers Drive Component Video & LCD Displays -  DN213  Design Notes (Linear Technology) (app note added 1/06)
Method synchronizes slaves in power-line communications -  11/09/00 EDN-Design Ideas....In PLC (power-line-communication) applications, the communications system usually uses one master and a large number of slaves (for example, 64). The idea presented here is an easy method for the synchronization….PDF contains multiple circuits, scroll to find the one of interest.... [Design Idea by Jose Sebastia and Diego Munoz, University of Valencia, Spain]


Sync Circuits#'s - M       N - Z

 
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