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Oscillators: Square Wave,
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#'s - C
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Oscillator Circuits -- Main Page
Last Updated on:
Friday, June 04, 2021 01:53 PM |
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Designed by Dave Johnson, P.E. : |
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VERY LOW POWER GATED CRYSTAL OSCILLATOR
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. The method keeps the
standby power consumption to a very low 1uA when used with a 3v supply.
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Links to electronic circuits, electronic schematics and designs for engineers,
hobbyists, students & inventors:
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Simple 1.5V Square Wave Generator - This simple circuit generates
a good and stable 1V peak-to-peak square wave at 100Hz, 1KHz and 10KHz using
a single 1.5V cell as power supply. An useful feature of this
circuit….(electronic schematic added 11/08) |
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Simple Squarewave Generator - Three switchable frequencies: 100Hz,
1KHz, 10KHz 1.5V battery operated, minimum parts counting (added 3/05)
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Square Wave Oscillator - It has adjustable (and settable)
frequencies from 1Hz to 100kHz and is an ideal piece of Test Equipment.
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Square Wave Oscillator - This project is a piece of test
equipment. It's a square wave oscillator with 6 selectable frequencies from
1Hz to 100kHz, incrementing in decade values. It's most useful
application ....(projected added 05/08) |
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Square Wave Oscillator (Andy Collinson) - A very basic square wave generator
using a CMOS 4011 NAND gate. (electronic schematic / circuit added 4/02)
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Square Wave Oscillator 555 - (electronic circuit added 4/05) |
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Square wave oscillator with fixed frequency steps using 555 timer chip -
(diagram added 05/07) |
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Squarewave Generator - Three switchable frequencies: 100Hz, 1KHz, 10KHz 1.5V
battery operated, minimum parts counting (added 3/05) |
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Square-wave modulator has variable frequency and pulse width - 8-Aug-02
Issue of EDN A few years ago, I worked at a disk-drive company. We had a plating
facility that required square waves to drive the high-voltage plating operation. The
challenge was that the square wave's pulse width had to be variable, along with the
duty cycle. Also, the amplitude of the pulses had to be adjustable.... [Design Idea by
Michael Fisch, Agere Systems, Longmont, CO] |
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Triangle & Square Wave Generator - (circuit / schematic design added 6/06)
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Very Low Power Astable Multivibrator - This classic circuit draws only 200
nanoamps from a 1.5v supply.... [Designed by David A. Johnson] |
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Very Low Power Gated Crystal Oscillator - 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. The method keeps the standby power consumption to a very low 1uA
when used with a 3v supply. …. [Designed by David A. Johnson] |
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