Electronic Circuits and Tutorials
Electronics Schematics - W

Waveform Generators Circuits

1KHz Sine Wave Generator:  Simple circuitry, Low distortion, battery operated Variable, Low impedance output up to1V RMS

2MHz RF Oscillator

4 Transistor Transmitter

68HC11 Synthesizes Accurate Sine Wave:  09/02/96 EDN-Design Ideas

Amplitude Stable Oscillator has Low Distortion, Low Cost:  11/09/00 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit

Audio Test Oscillator

Basic RF Oscillator #1

Convert periodic waveforms to square waves:  08/16/2001 EDN - Design Ideas / Converting periodic waveforms to square waves is an integral part of extracting a clock signal from data, creating waveform generators, and making timing-pulse generators. Any square-wave-conversion circuit is more valuable when the square wave's duty cycle is variable and controllable. Figure 1 shows a circuit that has these attributes and can drive several TTL-compatible loads.

Crystal Filter yields Pure Sine Wave:  06/98 Intersol Application Note # AN9815

Current Feedback Amp yields Simple Oscillator:  06/08/95 EDN-Design Ideas

DCC Waveforms and Voltages For DCC Systems

DDS and converter form signal generator:  02/20/03  EDN-Design Ideas / Many applications require low-frequency signal generators that can deliver high-performance, high-resolution signals. This Design Idea presents a circuit that generates frequencies of 0 to 1 MHz. Sinusoidal, triangular, and square-wave outputs are available. You can achieve frequency resolution of better than 0.

DDS device produces sawtooth waveform:  07/10/03  EDN-Design Ideas / Ramp or sawtooth waveforms are useful for a broad range of applications, including automatic-test equipment, benchtest equipment, and actuator control. Discrete components typically set the waveform frequency. Unfortunately, drift in these component values over time and temperature limits the accuracy of the output frequency.

DDS using AD9835

Digital 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

Digital Signals Produce Pure Sine Waves:  10/09/97 EDN-Design Ideas

Digital Sine-Wave Generator Produces 0° To 360° Phase-Shifts:  12/04/00 Electronic Design - Ideas for Design / Sine-wave generators with 0° to 360° phase-shifts are very important testing blocks in many systems involving DSP operations (i.e., I/Q modulator-demodulator communication, phase-angle measurements and up-down counter conversion in.

DTMF Coder Makes Low Cost Sine Wave Generator:  10/13/94 EDN-Design Ideas

Easily Tuned Sine Wave Oscillators:  National Semiconductor Application Notes,28-Jun-1996

Edge Detector Runs off of Single Supply:  12/04/97 EDN-Design Ideas

Edit and generate your own analog stimulus waveforms:  10/12/98 Electronic Design - Ideas for Design / In cases where low frequencies are acceptable, a user-defined analog waveform can be generated using the design presented. The circuit employs a low-power 12-bit digital-toanalog converter (DAC) connected to the parallel printer port of a personal.

FAST, High Current Pulser:

Few Extra Components Stabilize Oscillator:  102/15/96 EDN-Design Ideas

FIFO Makes Cheap Waveform Generator:  12/21/95 EDN-Design Ideas

Flash-ROM-based multichannel arbitrary-waveform generator:  04/19/99 Electronic Design - Ideas for Design / No means for waveform synthesis is more flexible than the arbitrary waveform generator (AWG). In this marriage of digital and analog, large memory arrays that contain a separate datum for each.

FleaPower Oscillator Consumes only 1 µA:  05/21/98 EDN-Design Ideas

Flip Flop Flashers, Buzzers, Etc.

Four Transistor Tracking Transmitter

Gated Oscillator Emulates a Flip Flop:  03/16/95 EDN-Design Ideas

Gates Provide Low Cost Sine Wave Generator:  08/15/97 EDN-Design Ideas

Generate An Analog Signal With a µC:  10/22/98 EDN-Design Ideas

Harmonic oscillator

LC Oscillator has 1% THD:  03/31/94 EDN-Design Ideas

linkwitz Cosine Burst Generator:  part of speaker measurement set described in the construction article

Load Pulser Tests Supply's Transient Response:  04/11/96 EDN-Design Ideas

Low Cost Function Generator

Low Distortion Oscillator Starts Fast:  05/26/94 EDN-Design Ideas

Low Distortion, Amplitude Stable Sine Wave Oscillator

Low Frequency Sine Wave Generator:  The two circuits below illustrate generating low frequency sine waves by shifting the phase of the signal through an RC network so that oscillation occurs where the total phase shift is360 degrees.

Microcontroller-based sine-wave generator has crystal accuracy:  12/14/98 Electronic Design - Ideas for Design / One way to generate a sine wave is to pass a square wave through a low-pass filter. The high-order harmonics will be filtered out, leaving only the fundamental. The higher the order of the filter, the purer the sine wave produced. The MAX292.

Microphone Circuit Test Oscillator:  440 Hz Tone generator for testing XLR microph1-lines

MonoStable Flip Flops (One Shot)

Negatrons Enrich Filter, Oscillator Designs:  07/21/94 EDN-Design Ideas

New stable RC pulse generator:  02/08/99 Electronic Design - Ideas for Design / Few circuits are more commonplace than the basic squarewave-output astable multivibrator illustrated in Figure 1. Useful whenever a relatively.

Occasional Pulse Circuit:

OpAmp Oscillators Simplify RF Designs:  10/10/96 EDN-Design Ideas

Oscillator Lowers Distortion & Phase Noise:  08/18/94 EDN-Design Ideas

Oscillator turns on Instantly, off Synchronously:  05/23/96 EDN-Design Ideas

Oscillator, 2MHz.:  Fair Warning: this site has pop-up ads

Parallel port controls arbitrary waveform generator:  06/13/2002  EDN - Design Ideas / You can use the parallel port of your PC and a few additional components to generate a powerful, easy-to-use arbitrary-waveform generator. By using a Visual Basic program with the circuit in Figure 1, you can generate any waveform (for example, sinusoid, triangle, amplitude- or frequency-modulated, or exponential decay) by simply entering its characteristic equation.

Parallel port controls arbitrary waveform generator:  06/13/2002  EDN - Design Ideas / You can use the parallel port of your PC and a few additional components to generate a powerful, easy-to-use arbitrary-waveform generator. By using a Visual Basic program with the circuit in Figure 1, you can generate any waveform (for example, sinusoid, triangle, amplitude- or frequency-modulated, or exponential decay) by simply entering its characteristic equation.

PC Controls inexpensive Waveform Generator:  06/05/96 EDN-Design Ideas

Precise Triangle Wave Generation:  National Semiconductor Application Notes,28-Jun-1996

Precision Waveform Converter uses Sawtooth Wave:  03/01/96 EDN-Design Ideas

Programmable oscillator uses digital potentiometers:  03/07/2002  EDN - Design Ideas / Digital potentiometers are versatile devices; you can use them in many filtering and waveform-generation applications. This Design Idea describes an oscillator in which setting the resistance of two digital potentiometers independently programs the oscillation amplitude and frequency. Figure 1 shows a typical diode-stabilized Wien-bridge oscillator that generates accurate sine waves

Programmable Ramp Generator has 14 Bit Linearity:  09/12/96 EDN-Design Ideas

Pulse Generator:  Fair Warning: this site has pop-up ads

Pulse Generator

Pulse Generator & Signal Tracer:  Dual-purpose test-instrument Very simple Circuitry,1.5 Volt Battery-operated

Pulse Generator Verifies Test Setups:  05/26/94 EDN-Design Ideas

Pulse Generator, 555: Fair Warning: this site has pop-up ads

Pulse Stretcher Increases ECL Gate Gains:  01/20/94 EDN-Design Ideas / stretches the output pulses of an ECL comparator by operating the ECL line receivers with unusually large pulldown resistors to the -15V supply. The large load resistance maximizes the gains of the emitter-follower output stages and speeds up the rising edges. At the same Time, the low pulldown current, together with the input and wiring capacitances, slows the falling edges. These actions stretch the positive pulses by approximately2 nsec/stage.

Pulse Width Adjuster Reverses Servo Motor:  03/17/94 EDN-Design Ideas

Pulse Width Trimmer Outdoes One Shots:  03/03/97 EDN-Design Ideas

Pulsed Sensor Extends Battery Life:  01/01/98 EDN-Design Ideas 

RF oscillator uses current feedback op amp:  10/03/2002  EDN - Design Ideas / A current-feedback amplifier is a well-known component with many uses. Its basic block diagram shows that its input stage is a voltage follower—in practice, a symmetrical emitter follower (Figure 1). The configuration samples the output current, converts it to voltage across a large impedance, and amplifies it to the output using a high-power, low-output-impedance amplifier.

Sawtooth Generator Spans a 70 DB Range:  07/07/94 EDN-Design Ideas

Scheme yields Frequency Locked Triangle Waves:  02/02/98 EDN-Design Ideas

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

Simple Circuit Generates +3.3 V At 1 A From –5 V:  05/24/04 Electronic Design - Design Briefs / Figure 1 depicts a circuit that uses pulse-frequency modulation (PFM) to generate +3.3 V from a −5-V power supply without the need for a transformer. It's ideal for applications that have a stable.

Simple Circuit Generates Clean Sine Waves:  06/19/97 EDN-Design Ideas

Simple Compensation Extends Oscillator's Range:  12/05/96 EDN-Design Ideas

Simple Sinewave Generator

Simple sine-wave generator has no low- or high-pass filters:  05/25/98 Electronic Design - Ideas for Design / Generating sine waves with controlled frequencies over a wide range is difficult when using RC or LC sinusoidal oscillators. However, this performance can be simply created using a wideband digital square wave oscillator, a counter, and a weighted.

Simple Technique Generates Precise HART Waveforms :  07/22/02 Electronic Design - Ideas for Design / Designed to complement conventional 4- to 20-mA analog signaling, the Highway Addressable Remote Transducer (HART) protocol supports two-way digital communications for process measurement and control devices. The protocol uses frequency-shift keying.

Sine Wave Generation Techniques:  National Semiconductor Application Notes,04-Nov-1995

Sine Wave Generator

Sine Wave Generator With Crystal Accuracy

Sine Wave Generator With Crystal Accuracy

Single Chip Digital Sine Wave Generator

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.

Soft On / Off Switch:

Square wave modulator has variable frequency and pulse width:  08/08/2002  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..

Square Wave Oscillator

Square Wave to Sine Circuit

Summer Linearizes Ramp & Triangle Generators:  12/08/94 EDN-Design Ideas

Swept sine oscillator has quadrature output:  08/18/97 Electronic Design - Ideas for Design /  Signals with a know frequency but unknown phase may be detected using an in-phase and a 90° shifted reference signal, as frequently used in lock-in amplifiers, synchronous detectors, and frequency-response analyzers. The 90°-shifted signal.

SwOpAmp Makes Square Wave Generator:  02/15/96 EDN-Design Ideas

Time Domain Reflectometer

Time Domain Reflectometer (TDR)

Tiny Programmable Oscillator Operates From 5 kHz To 20 MHz:  08/06/01 Electronic Design - Ideas for Design / By merging a digital potentiometer with an oscillator chip, a very small programmable oscillator (1 µMAX and one SOT-23 package) can be realized. In addition to consuming very little board space, the circuit requires only three signals.

Transconductance amp gives oscillator reciprocal response:  04/17/03  EDN-Design Ideas / The circuit in Figure 1 is a variation on the familiar integrator/comparator triangle-wave oscillator, which you typically implement with two op amps. An integrator and a comparator connect in a positive-feedback loop; the comparator drives the integrator and vice versa. A fixed amount of hysteresis exists in the comparator, producing a triangle wave at the integrator's output.

Tri Waveform Generator

Triangle & Square Wave Generator

Triangle / Square wave Generator:

Triangle Waveform Generator

Triangle/square-wave oscillator serves dual purpose:  11/22/99 Electronic Design - Ideas for Design / In conventional triangular-wave oscillators, hysteresis from positive feedback in the Schmitt trigger determines the voltage levels and amplitude of the triangular waves. With this topology, it’s.

Twin T Audio Sine Wave Oscillator

UHF Oscillator:

Variable Gain Control Produces Pure Sine Wave:  10/27/94 EDN-Design Ideas

Voltage Controls Sine Wave Frequency:  08/17/95 EDN-Design Ideas

Waveform Conversion:  sine to square and square to sine

Waveform Generator Demodulates FM Signals:  10/10/96 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit

Waveform generator produces biological-stimuli signals:  05/01/97 Electronic Design - Ideas for Design / Electrical simulators are widely used in biological research for the study of evoked potentials in man and other applications. Indeed, versions are on sale in local health stores or via mail order for treatment of pain.

Wein Bridge Oscillator:

Wein Bridge Oscillator is Reborn:  06/13/02 EDN-Design Ideas / In 1940, William Hewlett and David Packard launched a product from a garage. product was a Wien-bridge oscillator. It consisted of a single-pole highpass filter in series with a single-pole lowpass filter.

Wein Bridge Oscillator keeps THD Below One PPM:  11/10/94 EDN-Design Ideas  / The Wien-bridge sine-wave oscillator uses a light bulb to stabilize its amplitude. The circuit doesn't have a light bulb; it sports several enhancements that lower its distortion and generate a test signal pure enough for testing modern op amps and high-resolution A/D converters.

Wein Bridge Theremin

WiFi Can Antenna

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