Voltage Comparator Electronic Circuits

Voltage Comparator Circuits
Last Updated on: Friday, March 12, 2010 12:07 PM

Circuits Designed by Dave Johnson, P.E.:

40KHz Ultrasound Receiver
A X100 transistor amplifier is followed by a zero cross detector circuit, using a voltage comparator. The output is a TTL logic signal, corresponding to the received 40KHz signal. (added 7/06)

PRECISION ULTRA LOWER POWER OSCILLATOR
This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages.

Wide Band Zero Cross Detector
This circuit was designed to convert a low amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about 150KHz.

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

AN-1119: Voltage Doubler Design and Analysis - National Semiconductor Application Note (app note added 2/06)

AN804: Design Alternatives to the TC682 for Perfoming Inverting Voltage Doubler Functions TC682, TCM828/9, TC1219/20, TC1142 - Microchip Application Note Published 28-Oct-03 (app note added 2/06)

Circuit Forms Single Pulse Voltage Multiplier - 09/18/03 EDN-Design Ideas: It is sometimes necessary for a microcontroller to generate a pulse whose voltage is higher than the power-supply voltage of the microcontroller. The circuit in Figure 1 allows you to generate 14V pulses from a 5V power supply. An adaptation of the circuit provides a 5 to 12V programming pulse for programming the fuse bits in Atmel.....(design idea added 12/04)

Design Alternatives to the TC682 for Perfoming Inverting Voltage Doubler Functions TC682, TCM828/9, TC1219/20, TC1142 - Microchip Application Note Published 28-Oct-03 (app note added 2/06)

MicroController delivers voltage multiplied DC power - 05/11/06 EDN-Design Ideas: Use the microcontroller's comparator and PWM blocks to form a simple inductor-based boost converter.....(design idea added 9/08)

Voltage doubler - (circuit added 04/05/06)

Voltage Doubler Design and Analysis - National Semiconductor Application Note (app note added 2/06)

Voltage doubler improves accuracy - 02/05/09 EDN-Design Ideas: , A transistor's low saturation voltage results in less loss.....(design idea added 08/09)

Voltage Doubler Input DCC Only Block Occupancy Detector - (schematic added 8/03)

Voltage doubler recconsworld - (electronic circuit added 4/05)

Voltage doubler uses inherent features of push pull dc/DC converter - 08/16/07 EDN-Design Ideas: Paralleled Darlingtons drive a wide-range voltage doubler.....(design idea added 09/08)

Voltage Multiplier Circuit - A collection of simple but useful circuits made with silicon diodes. Scroll to find the voltage multiplier circuit. (6/06)