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Charge Pump Circuits
Page 2 Charge Pumps:
#-CD-NO-Z Last Updated on:
Thursday, November 30, 2017 01:57 PM
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.
HIGH POWER TOUCH SWITCH EXCITER CIRCUIT
If you have hundreds of touch switches that need an excitation signal, then this
circuit is what you need. Its 20KHz 20v peak to peak output signal can supply
up to 3 watts of touch switch excitation power.
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. …. [Designed by David A. Johnson]
High Power Touch Switch Exciter Circuit - If you have hundreds of touch
switches that need an excitation signal, then this circuit is what you need.
Its 20KHz 20v peak to peak output signal can supply up to 3 watts of touch switch
excitation power.... [Designed by David A. Johnson]
Medium Power 125kHz Oscillator - This circuit is similar to CMOS
INVERTERS FORM 125KHZ OSCILLATOR but adds more inverters in parallel to deliver
yet more power. The values shown are for 125KHz.... [Designed by David A.
Johnson]
Medium Power 125kHz Oscillator-2 - This circuit is similar to MEDIUM
POWER 125KHZ OSCILLATOR but adds even more inverters in parallel to deliver yet
more power. The values shown are for 125KHz.... [Designed by David A.
Johnson]
