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Charge Pump Electronic Circuits

Charge Pump:  #'s - B      C - F       G - R      S - Z
 

Last Updated: October 09, 2017 03:38 PM

Circuits Designed by Dave Johnson, P.E.

Gated 125Khz Oscillator This circuit is uses a NAND gate as an inverter.  The gate allows the oscillator to be gated on and off.  Again, the values shown set the frequency at 125KHz but can be changed to produce other frequencies . . . Hobby Circuit designed by David Johnson P.E.-March, 2002

Gated Crystal Oscillator with Very Low Power The circuit gates the output of a continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed.  The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going and switching on a transistor power stage only as needed . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

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. . . Circuit by Dave Johnson P.E.-February, 2002

LC Oscillator Medium Power 125Khz 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 . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Medium Power 125khz Oscillator This circuit adds even more inverters in parallel to deliver yet more power.  The values shown are for 125KHz. . . Circuit by Dave Johnson P.E.-March, 2002

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.. . . Circuit by David A. Johnson P.E.-March, 2002

Micro Power Over-Temperature Alarm The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a. . . Circuit by David Johnson P.E.-June, 2000

Night_Light_with_20_LED -  After 3 years of continuous 24/7 operation I noticed that the 20 LED array I was using as a night light next to my back door was fading.  Some of the LEDs were much dimmer than others.  I figured that over time, the internal heat dissipated from the LED chip was causing the LED light intensity to fade.  I decided it was time to replace the light. . . . Hobby Circuit by David Johnson P.E.-July, 2017

Over-Temperature Micro-Power Alarm The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

Peak to Peak 300v Signal Generator This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall times . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000


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

Gated 125Khz Oscillator This circuit is uses a NAND gate as an inverter.  The gate allows the oscillator to be gated on and off.  Again, the values shown set the frequency at 125KHz but can be changed to produce other frequencies . . . Hobby Circuit designed by David Johnson P.E.-March, 2002

Gated Crystal Oscillator with Very Low Power The circuit gates the output of a continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed.  The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going and switching on a transistor power stage only as needed . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

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. . . Circuit by Dave Johnson P.E.-February, 2002

High Power Voltage Regulator has Low Dropout Voltage App Note #52___ Maxim Integrated

Inductorless Switching Regulator Boosts Input Voltage App Note #5___ Maxim Integrated

Inductorless Voltage Converter Boosts a Single Lithium Cell App Note #1791___ Maxim Integrated

LC Oscillator Medium Power 125Khz 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 . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Low Battery Monitor Delays System Shutdown App Note #134___ Maxim Integrated

Low Noise 12V Power Supply from a Single-Ended 15V Input Supply The LTC3260 is a low noise dual polarity output power supply that includes an inverting charge pump with both positive and negative LDO regulators.  The charge pump operates over a wide 4.5V to 32V input range and can deliver up to 100mA of output current.  Each LDO regulator can provide up to 50mA of output current.  The negative __ Linear Technology/Analog Devices App Note, Apr 19th 2012

Low Noise Audio Power Supply App Note #169___ Maxim Integrated

Lower Operating Frequency Improves Icl7660 Voltage Conversion Efficiency App Note #10___ Maxim Integrated

Medium Power 125khz Oscillator This circuit adds even more inverters in parallel to deliver yet more power.  The values shown are for 125KHz. . . Circuit by Dave Johnson P.E.-March, 2002

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.. . . Circuit by David A. Johnson P.E.-March, 2002

Methods Reduce Input Ripple for All Charge Pumps App Note #2027___ Maxim Integrated

Micro Power Over-Temperature Alarm The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a. . . Circuit by David Johnson P.E.-June, 2000

Miniature Precision Negative Reference Requires No Precision Resistors App Note #824___ Maxim Integrated

Modded charge pump extracts power from digital signal EDN-Design Ideas 09/26/2015    At first glance, these charge pumps & voltage multiplier/inverters look conventional, but they have a trick up their sleeves__ Circuit Design by Luca Bruno & Duilio Pozzoni

New Charge Pumps offer Low Input & Output Noise DN243 Design Notes __ Linear Technology/Analog Devices

New Step-Down Charge Pumps Are Tiny Efficient & Very Low Noise DN310 Design Notes___ Linear Technology/Analog Devices

Night_Light_with_20_LED -  After 3 years of continuous 24/7 operation I noticed that the 20 LED array I was using as a night light next to my back door was fading.  Some of the LEDs were much dimmer than others.  I figured that over time, the internal heat dissipated from the LED chip was causing the LED light intensity to fade.  I decided it was time to replace the light. . . . Hobby Circuit by David Johnson P.E.-July, 2017

One 9 Volt Battery Gives +18 +25 +33V This circuit is based on MAX1044 is a charge pump converter __ Designed by R.G. Keen

Over-Temperature Micro-Power Alarm The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

Peak to Peak 300v Signal Generator This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall times . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000

Provides +5 Volt Gate Bias from  48 Volt Input App Note #1803___ Maxim Integrated

Provides 5v Gate Bias from 48v 09/19/02 EDN-Design Ideas A small and simple circuit derives 5V from the -48V rail that telecomm applications typically use (Figure 1).  Useful for gate bias and other purposes, the 5V supply delivers as much as 5-mA output current.  A shunt reference__ Circuit Design by William Hadden

Pulsing Charge Pump Drives Capacitive Loads 11/05/98 EDN-Design Ideas (Several circuits here, scroll to find this one)  The test circuit in Figure 1  efficiently drives various capacitive loads, such as memory cells and simple capacitors, so that you can observe their leakage effects.  Essentially, the circuit is a pulsed and variable current source acting as a charge pump.  A pulsed voltage source drives a one-shot oscillator__ Circuit Design by Paul J Rose, Mental Automation Inc, Bellevue, WA

Regulated Charge Pump Delivers 50ma App Note #35___ Maxim Integrated


Charge Pump:  #'s - B      C - F       G - R      S - Z

 


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