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Smooth Tone Clickless CW SideTone Generator - This circuit is
about as good as it gets for generating morse code tones. It may be used as
a code practice oscillator, a tone generator for a keyer, a sidetone
oscillator for a CW transmitter or an audio Modulated CW (MCW) generator for
an FM transmitter or repeater.... [G. Forrest Cook] |
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Soft Limiter for Oscillator Circuits Uses Emitter Degenerated Differential
Pair - 10/12/06 EDN-Design Ideas....Phase-shift network plus a few
active components yields low-distortion output.... EDN is migrating links.
This link is not verified. Search the "title" EDN for new link.
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Soundfield Simulator for Stereo Headphones - An adaptation of the
Linkwitz acoustic simulator (see An Acoustic Simulator for Headphone
Amplifiers by Chu Moy above) as a front-end for headphone amplifiers with
very....continuously adjustable Soundfield control. Designed by
Chester Simpson (Circuit design added 03/08) |
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Specifying Quartz Crystals - Maxim Application Notes / 726 /
Dec-08....[App Note] |
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Spot-frequency Sine Wave Generator - 300Hz, 1KHz, 3KHz "output
stable" test equipment tool. 9V battery powered portable unit (added 3/05)
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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 output. …. [Designed by David
A. Johnson] |
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[_OLD-ads-dont_upload/OLD I-ADS from web/ad-djandassoc.htm] |
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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 is as a Signal Injector for
radios and TV's. A square wave is the most suitable for testing the IF (Intermediate
Frequency) strip as the signal will pass through the IF transformers without any
attenuation, no matter what....(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 (Seiichi Inoue) - (electronic circuit added 4/05)
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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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Square Wave to Sine Converter - (electronic schematic / circuit added 4/02)
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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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Stable 40kHz Clock (Rodney Radford) - ASCII format-A circuit that I have
used before is based on the CD4060 (14stage binary counter) and a 640Khz ceramic
resonator. The CD4060 is basically an oscillator and a ripple counter to divide the
640khz down to something more usable. (Circuit design added 06/06) |
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Stable, 18 MHz oscillator features automatic level control, clean sine wave output
- 23-Jun-05 Issue of EDN Analog oscillator has stable RF output....
[Design Idea by Jim McLucas, Longmont, CO; Edited by Brad Thompson and Fran Granville] |
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Study of the Crystal Oscillator for CMOS CoPS - National Semiconductor
Application Note 04 Nov1995 (app note added 2/03) |
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Summer Linearizes Ramp & Triangle Generators - 12/08/94 EDN-Design
Ideas....The ramp generator in Fig 1a and the triangle-wave generator in Fig 1b charge
capacitor C1 linearly. The key to the circuits' linearity is an op-amp adder that sums
a reference voltage with the voltage on C1. For Fig 1a's ramp generator, the adder
comprises op-amp IC1, R4, R5, and associated components.... EDN is migrating links.
This link is not verified. Search the "title" + "EDN" for new link. |
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Sweep your Function Generator - Function generators built around the XR2206
have always had an excellent price/performance ratio, and the IC although
‘obsolescent’ is still available. If your generator does not have built-in sweep (‘wobbulator’)
capability, a small external circuit is all you need….must register on this site....
[Published in Elecktor July/August 2010] |
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SwOpAmp Makes Square-wave Generator - 02/15/96 EDN-Design Ideas.... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new
link. |
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System implements digital clock modulation - 28-Oct-04 Issue of EDN In
spread-spectrum and direct-sequence receivers, it's often necessary to change the
frequency of the clock oscillator, and thus the spreading-code clock, to lock the
receiver's reference pseudorandom-noise code to the incoming code. The original design
used a VCXO (voltage-controlled crystal oscillator] for this function, but this
revised design implements an all-digital method that provided a.... [Design Idea by
Dan Doberstein, DKD Instruments, Nipomo, CA] |
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