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Clock Circuits
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Last Updated on: Friday, August 21, 2015 06:59 AM

Circuits Designed by Dave Johnson, P.E. :
  • Automatic Timeout included with this On/Off Flip/flop Circuit -  This circuit is ideal when a device needs to be turned on and off with a single pushbutton switch, but also needs to turn itself off after some period of time. With the components shown, the output will stay on for only about 20 seconds . . . [Hobby Circuit designed by Dave Johnson P.E.,  05/01/12]

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

AN-1173: High Speed Bus LVDS Clock Distributionusing the DS92ck16 Clock Distribution Device -  Application Note. . .  [National Semiconductor]

 

AN-1439: Use of the LMV112 to Reduce Reference Clock Interaction in Handheld Device -  Application Note. . .  [National Semiconductor]

 

AN-291: Asynchronous Clock Interfacing with the AD7878 -  AN-291 Analog Devices App Note - . . . 

 

AN580: Using Timer 1 in Asynchronous Clock Mode -  Application Note Published 22-Nov-99. . .  [Microchip]

AN582: Low-Power Real Time Clock -  Application Note Published 22-Nov-99. . .  [Microchip]

 

AN590: A Clock Design using the PIC16c54 for LED Displays & Switch Inputs -  Application Note Published 26-Aug-97. . .  [Microchip]

 AN615: Clock Design using Low Power/Cost Techniques -  Application Note Published 26-Aug-97. . .  [Microchip]

 

AN-616: AD9430 Evaluation Board Modifications for XTAL Oscillator Clocking -  AN-616 Analog Devices App Note - . . . 

 

AN-642: Coupling a Single-Ended Clock Source to the Differential Clock Input of Third-Generation TxDAC & TxDAC+ Products -  AN-642 Analog Devices App Note - . . . 

 

AN649: Yet Another Clock Featuring the PIC16c924 -  Application Note Published 26-Aug-97. . .  [Microchip]

 

AN-657: ADN2812 Evaluation Board -  AN-657 Analog Devices App Note - . . . 

 

AN-746: Supporting FDDI with the ADN2812 -  AN-746 Analog Devices App Note - . . . 

 

AN-769: Generating Multiple Clock Outputs from the AD9540 -  AN-769 Analog Devices App Note - . . . 

 

AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale Package -  AN-772 Analog Devices App Note - . . . 

 

AN892: Fail-Safe Monitoring & Clock Frequency Switching using the PIC16f684 -  Application Note Published 16-Dec-03. . .  [Microchip]

 

AN-984: Power & Thermal Considerations for High Speed Clock Generators -  Application Note. . .  [National Semiconductor]

 

AN-988: High Speed Clock Sources & Their Effect on Electromagnetic Compatibility -  Application Note. . .  [National Semiconductor]

 

Application of Zero Delay Buffers in Systems with Large Memory Arrays -  Application Brief # 024. . .  [Pericom Semiconductor]

 

Application of Zero-Delay Buffers in Switched Ethernet -  Application Note # 015. . .  [Pericom Semiconductor]

 

Astable 40KHz clock -  A circuit that I have used before is based on the CD4060 (14stage binary counter) and a 640Khz ceramic resonator. The CD4060 is basically an oscillator and a ripple counter to divide the 640khz down to something more usable. . . .  [by  Rodney Radford]

 

AT89C2051 Digital thermometer and clock -  Build your own a laboratory instrument for measuring time and temperature. The DigiThermo demonstrates the use of 'C' language, a dual-slope converter, LCD interfacing, and digital filtering as well. . . .  [Wichit Sirichote, designer]

 

Auto Snooze for Digital Alarm Clocks -  Alarm clocks are made to wake you up. However, it is quite bothersome to hear the alarm continuously until you get up and put it off. Also, you might fall asleep again. The snooze facility solves this problem to some extent by allowing you to turn the alarm off for a specific period of time by pressing a switch. But here again, you need to look for the snooze switch! . . .  [ EFY Enterprises Pvt. Ltd. All rights reserved.]

 

Automatic Timeout included with this On/Off Flip/flop Circuit -  This circuit is ideal when a device needs to be turned on and off with a single pushbutton switch, but also needs to turn itself off after some period of time. With the components shown, the output will stay on for only about 20 seconds . . . [Hobby Circuit designed by Dave Johnson P.E.,  05/01/12]

 

Avoid Metastability -  08/30/01  EDN Design Idea   Consider a computer system that has a host processor connected to a remote-I/O subsystem (Figure 1). The host clock treats the I/O system, which is located far from the main hardware, as a slave. Because of the transmitters, receive. . .  [by Jonathan Eckrich, Adaptivation, Sioux Falls, SD]

 

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