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Sawtooth Generator Spans a 70 DB Range - 07/07/94 EDN-Design Ideas: The circuit in
Fig 1 demonstrates a simple method for generating a voltage-programmable sawtooth
waveform having a dynamic range greater than 70 dB. In addition to the sawtooth
waveform, the circuit also produces corresponding triangleand square-wave outputs. The
three ICs and associated components cost a total.....(design idea added 3/03) |
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Scheme yields Frequency Locked Triangle Waves - 02/02/98 EDN-Design Ideas: The
circuit in Figures 1 and 2 generates frequency-locked triangle waves of constant
amplitude. It uses readily available TTL and other older-technology parts. The
circuit portion in Figure 1 comprises the frequency dividers, counters, and converter.
The portion in Figure 2 contains current sources, output circuits,.....(design idea
added 5/03) |
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Self Oscillating Amplifier for Distortion Testing - allows the home constructor to
make quite accurate measurements, without having to spend a lot of money on a low
distortion oscillator (added 5/02) |
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series regulator with Q900 - This is a series regulator with Q900 being the
control element, Q901 a driver, and Q902 an error amp. ZD900 forms the emitter
reference voltage source. Since the generated high voltage and other voltages are
linked by means of the magnetic field of T900, any change in H.V. will be reflected
back to all of the other voltages. (added 02/05) |
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Servicing & Repairing Pagers Using the Agilent 8648A Option 1EP - Agilent
Application Note (added 6/06) |
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Shift registers & resistors deliver multiphase sine waves - 04/13/06 EDN-Design
Ideas: This simple method uses only digital logic and fixed-value
resistors.....(design idea added 9/08) |
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Signal Controls Sine Generator - 05/15/03 EDN-Design Ideas: The circuit of Figure
1 produces an accurate, variable-frequency sine wave for use as a general-purpose
reference signal. It includes an eighth-order elliptic, switched-capacitor lowpass
filter, IC3, which uses a 100-kHz square-wave clock signal that microcontroller IC2
generates. (Any other convenient square-wave source is also acceptable.....(design
idea added 1/05) |
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Signal Frequency Beat Frequency Oscillator - The days when you could listen to
amateurs on a simple shortwave AM receiver are with us again, thanks to the
development of this one-transistor, frequency-agile signal frequency beat frequency
oscillator. When teamed up with a low-cost AM set covering 3.5 and 7 MHz, this device
provides effective reception of local eighty and forty metre SSB
transmissions.....(electronic design / schematic added 2/05) |
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Signal Processor Adds LED Display - 06/06/96 EDN-Design Ideas: Designers using the
Texas Instruments TSS400, a versatile 4-bit sensor-signal processor, may find the
circuit in Figure 1 useful as a replacement for, or an adjunct to, the IC's built-in
display capabilities.....(design idea added 5/05) |
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Signal Processor DSP for Radio Communications - (electronic circuit added 7/03) |
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Signals Produce Pure Sine Waves - 10/09/97 EDN-Design Ideas: (design idea added
3/03) |
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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 is that frequency changes can be
obtained by switching only one capacitor at a time. Current consumption is about
600µA. * If a precise 50% duty-cycle is needed, trim R1 and monitor the output wave
form by means of an oscilloscope. * A good 500mV peak-to-peak square wave is provided
even at 1V supply. ….(electronic schematic added 11/08) |
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Simple Circuit Generates Clean Sine Waves - 06/19/97 EDN-Design Ideas: (design
idea added 3/03) |
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Simple Compensation Extends Oscillator's Range - 12/05/96 EDN-Design Ideas: A
simple technique provides phase compensation for the oscillator in Figure 1a. In this
circuit, a tungsten lamp regulates the amplitude of a crystal bridge oscillator. This
type of oscillator produces a very low-distortion output at a very stable frequency.
The op amp must have a.....(design idea added 3/03) |
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Simple IF Signal Generator - (electronic circuit added 10/05) |
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Simple Interface between D/A Converter & Microcomputer Leads to Programmable Sine-Wave
Oscillators - AN-319 Analog Devices Application Notes (app note added 6/06)
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Simple nanosecond width pulse generator provides high performance - 11/11/04 EDN-Design
Ideas: If you need to produce extremely fast pulses in response to an input and
trigger, such as for sampling applications, the predictably programmable
short-time-interval generator has broad uses. The circuit of Figure 1, built around a
quad high-speed comparator and a high-speed gate, has settable 0- to 10-nsec output
width with 520-psec, 5V transitions.....(design idea added 11/04) |
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Simple sine synthesizer generates 19 kHz pilot tone for FM baseband signal -
04/14/05 EDN-Design Ideas: Low distortion, single-frequency sine source for stereo
FM.....(design idea added 5/05) |
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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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Sine reference is synchronous with AC line - 02/15/00 EDN-Design Ideas: (design
idea added 2/06) |
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Sine Synthesizer Generates 19 kHz Pilot Tone for FM Baseband Signal - 04/14/05 EDN-Design
Ideas: Low distortion, single-frequency sine source for stereo FM.....(design idea
added 5/05) |
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Sine Wave Generation Techniques-AN263 - National Semiconductor Application Note
04-Nov-1995 (app note added 2/03) |
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Sine Wave Generator - (electronic circuit added 7/03) |
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Sine wave generator outputs precise periods - 04/26/01 EDN-Design Ideas: (design
idea added 2/06) |
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Sine Wave Generator zen22142 - A classic Wien Bridge oscillator using an Op-Amp
covering a frequency range of 15 to 150kHz in four switched steps…..(electronic
schematic / circuit added 4/02) |
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Sine Wave Oscillator - Here is a simple Sine Wave Oscillator Circuit....(design
added 12/08) |
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Sine/Cosine Wave Oscillator - (electronic circuit added 7/03) |
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Sinewave Generation Techniques - I recently discovered an interesting application
note from National Semiconductor in October of 1999. The article details nine sine
wave generation techniques. Some techniques can be accomplished several ways so there
are more than nine circuits available....(added 6/07) |
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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, or a SideTone oscillator for a transmitter. (added 5/02) |
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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.....(design idea added 9/08) |
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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 added 5/08) |
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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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Square Wave Modulator has Variable Frequency & Pulse Width - 08/08/02 EDN-Design
Ideas: 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 added 1/05) |
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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 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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Stable 18 MHz oscillator features automatic level control clean sine wave output -
06/23/05 EDN-Design Ideas: Analog oscillator has stable RF output.....(design idea
added 10/05) |
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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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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.....(design idea added 2/06) |
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SwOpAmp Makes Square Wave Generator - 02/15/96 EDN-Design Ideas: (design idea
added 3/03) |
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System implements Digital clock modulation - 10/28/04 EDN-Design Ideas: 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 added 11/04) |
