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Oscillators:  Sine Wave
#'s - N        O - S        T - Z

Oscillator Circuits -- Main Page


Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :
Parallel LC Oscillator with CMOS Inverter  - I have used this parallel resonant LC oscillator circuit countless times.  The oscillator frequency is determined by the inductor and capacitor values.  I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747

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

Op-Amp Oscillators Simplify RF Design -  10/10/96 EDN-Design Ideas - Figure 1 shows a novel circuit that uses a low-cost, high-speed op amp as a crystal-controlled RF sine-wave oscillator.  An op-amp oscillator offers several advantages.  Because an op amp is a complete amplifier with a high-impedance input __ Circuit Design by Charles Kitchin, Analog Devices, Wilmington, MA

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 __ Circuit Design by Jeff Smith, Analog Devices, Wilmington, MA

Oscillator Lowers Distortion & Phase Noise -  08/18/94 EDN-Design Ideas - In addition to its normal role of controlling oscillation frequency, the crystal in Fig 1 also acts as a high-Q, self-tuned output filter, which rejects the noise and harmonics of its input voltage, VB.  The result is a clean output-frequency spectrum.  With a __ Circuit Design by Giovanni Stochino, Ericsson Telecommunicazioni Spa, Rome Italy

Oscillator phase noise -  Phase noise serves as an important oscillator parameter and some amateur radio enthusiasts seem confused about what it is, how it’s measured, and most importantly, how it might affect what they’re working on __ Contact Vasily Ivanenko

Parallel LC Oscillator with CMOS Inverter  -  I have used this parallel resonant LC oscillator circuit countless times.  The oscillator frequency is determined by the inductor and capacitor values.  I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

Programmable oscillator uses digital potentiometers -  03/07/02 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 from __ Circuit Design by Alan Li, Analog Devices, San Jose, CA

Rectangular-Waveform Generator Produces 25 & 75% Duty Cycles -  03/18/10 EDN-Design Ideas - Use two ICs to produce both waveforms __ Circuit Design by Marián Stofka, Slovak University of Technology, Bratislava, Slovakia

RF Remote Controller -  On these pages, I will introduce Remote Controller with Radio Frequency.  The electric wave sending-out is controlled with the code by PIC for transmission and the code is deciphered by PIC for receiving.  PIC16F84A __ Designed by Seiichi Inoue

Room temperature controller -  On this page, I will introduce the room temperature controller with PIC.  This equipment uses two temperature sensors, drives external equipment, and keeps the temperature of the room at preset temperature.  The purpose of this equipment is for preventing room temperature going up with the heat of the computers.  Electric cost will become high if an air-conditioner is always operated.  Then, I made the equipment __ Designed by Seiichi Inoue

Self-Heated Transistor Digitizes Airflow -  13-Mar--96 EDN-Design Ideas - A sensitive and reliable way to measure airflow is to exploit the predictable relationship between airspeed and the heat dissipated by a sensor exposed to the flow while being held at a constant temperature differential above ambient.  The power required to maintain the elevated sensor temperature is proportional to the square root of the airspeed (King's law).  The popular hot-wire anemometer uses this principle, but suffers from the disadvantage of using a relatively fragile airflow sensor, a thin metallic filament __ Circuit Design by Stephen Woodward, University of North Carolina, Chapel Hill, NC

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 __ Circuit Design by Simon Bramble, Maxim Integrated Products, UK

Signal Processor DSP for Radio Communications -  The W9GR DSP-3 is an improved low cost digital signal processor for radio communications use.   It features 18 DSP functions, a LED display, and 13 bit audio precision__ Quantics

Simple Circuit Compensation Extends Oscillator's Range -  12/05/96 EDN-Design Ideas - A simple technique provide as 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 negligible phase shift at the operating frequency, which __ Circuit Design by Israel Schleicher, Green Spin, Bakersfield, CA

Simple Circuit generates clean sine waves -  06/19/97 EDN-Design Ideas - Generating a square wave at a particular frequency is fairly simple.  Many techniques for doing so exist, using counters, flip-flops, and--everyone's favorite--the venerable 555 timer.  Generating a sine wave, however, is not nearly as simple or inexpensive.  Figure 1 shows a technique for generating a high-quality sine wave from a square-wave source __ Circuit Design by Med Dyer, Jabra Corp, San Diego, CA

Simple Circuit 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 __ Circuit Design by Carlos Bernal and Diego Puyal, Departamento Ingeniería Electrónica y Comunicaciones, Universidad de Zaragoza, Zaragoza, Spain

Simple Circuit Sine Wave Oscillator including a PCB layout -  Here is a simple Sine Wave Oscillator Circuit.   __ Designed by G.L. Chemelec

Sine reference is synchronous with AC line -  02/15/00 EDN-Design Ideas - Many applications require a sinusoidal reference voltage synchronized to the ac line voltage.  You cannot derive such a reference voltage directly from the ac line because the waveform of the ac line is distorted because of nonlinear loads connected to the line and because the amplitude of the line signal varies.  Hence, you cannot use a simple step-down transformer to derive the reference signal.  The circuit in Figure 1 develops a line-synchronized reference signal whose phase and amplitude you can adjust using potentiometers P1, P2, and P3.  The circuit steps down and converts the line voltage to a square wave using the IC1A zero-crossing detector.  The integrator block, IC1B, then integrates the square wave to produce a triangular wave.  The triangular wave passes through two narrow bandpass filters comprising IC2A and IC2B.   __ Circuit Design by P Seshanna

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 __ Circuit Design by Carlos Bernal

Sine Wave Generator -  I introduce the sine wave oscillator which used the operational amplifier in this page.  The Wien bridge sine wave oscillator to introduce is the oscillator which works in the oscillation by returning (positive feedback) the oscillation output to the input.  Because there are few parts, the Wien bridge oscillator is the often used circuit.  The point of this circuit is the negative feedback circuit to make the oscillation operation be stable.   __ Designed by Seiichi Inoue

Sine Wave Generator -  A classic Wien Bridge oscillator using an Op-Amp covering a frequency range of 15 to 150kHz in four switched steps.   __ Designed by Andy Collison

Sine Wave Oscillator -  Here is a simple Sine Wave Oscillator Circuit.   __ Designed by G.L. Chemelec

Sine/Cosine Wave Oscillator -  I introduce the oscillator which outputs the Sine wave and the Cosine wave at the same time using the operational amplifier.  Because the distortion was big at the circuit to have been introducing before, I improved at the circuit with little distortion.  The circuit this time combines the integration circuit and the inverter by the operational amplifier.   __ Designed by Seiichi Inoue

Sinewave Generation Techniques -  I recently discovered an interesting App 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__ 

Sine-wave generator outputs precise periods -  04/26/01 EDN-Design Ideas - Rectangular pulse generators, even at high frequencies, are easy to design.  However, the design becomes more difficult if you need a signal that contains.    __ Circuit Design by JM Terrade, Clermont-Ferrand, France

Sinewave generator with AD9835 DDS, driven by BASIC-52 -  You may want to check out the regenerator project for more modern version of the chip, and using it with AVR microcontroller __ Designed by © Madis Kaal

Sine-wave step-up converter uses Class E concept -  02/17/05 EDN-Design Ideas - Many power applications ranging from luminescent and fluorescent lighting to telephone-ringing voltage generators require less sinusoidal-drive voltage.  These applications typically require a waveform of only moderate quality, and its frequency isn't especially critical.  However, avoiding waveform discontinuities that cause unwanted current peaks, excessive device dissipation, and EMC __ Circuit Design by Louis Vlemincq, Belgacom, Evere, Belgium

Sinusoid generator uses dual-output current controlled conveyors -  22-Jan-09 EDN-Design Ideas - You can design sine-wave oscillators without resistors, which improves on power consumption __ Circuit Design by Abhirup Lahiri, Netaji Subhas Institute of Technology, New Delhi, India

Spot-frequency Sine Wave Generator -  300Hz, 1KHz, 3KHz "output stable" test equipment tool.9V battery powered portable unit __ Contact Flavio Dellepiane, fladello @ tin.it

Square Wave to Triangle Wave Converter -  This circuit converts a square waveform to a triangle waveform while automatically maintaining a constant triangle amplitude for a wide range of input frequencies.  Although originally designed for application in a communications system, the idea is readily adaptable for certain electronic music applications where waveform conversion is desired.  Operation is as follows: Transistor Q2 provides a square wave at its collector that has an amplitude controlled by Q1
.   __ Designed by Arthur Harrison

Stable Pulse Generator Uses Matched Transistors In a Current Mirror -  02/02/12  EDN-Design Ideas - Inexpensive dual transistors work as well as do legacy matched pairs.   Using CMOS gates to generate pulses sometimes causes timing uncertainty due to gate-threshold variations.  For accurate pulse widths, you can use BJTs (bipolar-junction transistors).  Basing the design on current comparison allows the circuits to operate at low voltages.  Proper clamping of the timing capacitor avoids pulse shortening with increased repetition frequency.  These circuits work with somewhat less accuracy at supply voltages lower than 5V. __ Circuit Design by Bill Morong, Paoli, PA

Stable, 18 MHz oscillator features automatic level control, clean sine wave output -  06/23/05  EDN-Design Ideas - Analog oscillator has stable RF output __ Circuit Design by Jim McLucas, Longmont, CO

Stepper Motor controller -  On these pages, I will introduce a control circuit for stepper motor.  The software of this project is adapted to Embedded Systems (Lab13) for 2002 of Cleveland State University.  PIC16F84A __ Designed by Seiichi Inoue

Super Low Distortion Variable Sine Wave Oscillator -  The LT1028 (gain of –1 stable) /LT1128 (gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/rtHz 1kHz noise, 1.0nV/rtHz 10Hz noise.  This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128) , distortion-free __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Oscillators:  Sine Wave#'s - N        O - S        T - Z


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