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Charge Pump Circuits   Page 6
Charge Pumps:    #-C      D-N      O-Z

Last Updated on:
Wednesday, June 02, 2021 04:34 AM

Circuits Designed by Dave Johnson, P.E. :

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.,  06/04/00] 

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.,  06/03/00]

 

 

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

One 9 Volt Battery Gives +18 +25 +33V -  This circuit is based on MAX1044 is a charge pump converter. . .  [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.,  06/04/00]

 

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.,  06/03/00]

 

Provide 5v Gate BIAS from –48v -  09/19/02 EDN Design Idea   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. . .  [by William Hadden]

Provides 5v Gate Bias from –48v -  09/19/02 EDN Design Idea   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. . .  [by William Hadden]

 

Pulsing Charge Pump Drives Capacitive Loads -  11/05/98 EDN Design Idea   (Several circuits here, scroll to find this one)The test circuit in Figure 1efficiently drives various capacitive loads, such as memory cells and simple capacitors, so that you can observe their leakage effects. Essentially, . . .  [by Paul J Rose, Mental Automation Inc, Bellevue, WA]

 

Simple circuit provides 5V gate bias from –48V -  09/19/02  EDN Design Idea   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, IC1, de. . .  [by Will Hadden, Maxim Integrated Products, Sunnyvale, CA]

 

Solar Charge Controller -  The previous version of this device used pulse width modulation (pwm) to control the power from the five solar panels to charge the battery bank. Under full sun conditions the MOSFETS got a bit warm and the whole unit radiated a lot of RFI. This design uses a set of relays - one for each panel. If the controller decides the battery voltage is too low, it engages another relay; if its too high, it drops one out. This tends to 'float' the voltage at about 14 volts as long as sufficient sunlight is available. . . .  [by Luhan Monat-Mesa Arizona]

 

Square Wave Driver Has Flexible Outputs -  This circuit can produce an output signal ranging from DC to 100KHz. It can source a voltage ranging from 1v to 30v. It can sink a voltage ranging from zero volts to –30v. It can drive up to 200ma of current and can even be switched to a floating tristate . . . [Circuit by Dave Johnson P.E.,  07/08/00]

 

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