Low Distortion Sine Wave Generator Ic

Schematic of the sine wave oscillator consisting of a low distortion lt1632 based wien bridge oscillator core and an ltc1968 controlled amplitude stabilization loop.

Low distortion sine wave generator ic.

Low noise low distortion sine wave generator for testing adc demo boards demonstration circuit 1858a is a low noise low distortion sine wave generator designed to be used in conjunction withlineartechnology 16 bit and 18 bit adc demoboards. Description this circuit uses the versatile max038 function generator. Some distortion is common as it s difficult to completely eliminate the harmonics. Total harmonic distortion thd.

A more selective lc filter can be used to improve sine wave quality. A small filament bulb ensures a stable long term output amplitude waveform. The output of the ltc1968 equals the rms level of the sine wave divided by 3. Its output is sent to a low pass rc filter that filters out the harmonics leaving only the fundamental sine wave.

This document describes a design of a wave generator with a bandwidth over 10mhz which produce. Sine wave oscillators are used as references or test waveforms by many circuits. It also works down to 10 hz with much larger capacitors. A low distortion tuneable sine wave oscillator one can make a low distortion tuneable oscillator by incorporating an active filter inside an agc loop.

Functionally this board uses a wien bridge oscillator that. Abstrath this project comes from the necessity of getting a wave generator with a bandwidth over 10 mhz and an harmonic distortion under 1 all of this with a low cost price. Low distortion and low output impedance in order to obtain good overload capability. A cmos 555 timer ic produces a 50 duty cycle square wave.

Thus a sine wave may be the input to a device or circuit with the output harmonics measured to determine the amount of distortion. Sine triangle sawtooth or square pulse waveforms with an harmonic distortion under 1 duty cycle adjustment. A pure sine wave has only a single or fundamental frequency ideally no harmonics are present. Tom worked out the sample and hold circuit in 1987 for john linsley hood s spot frequency distortion meter.

It uses jlh s arrangement of the wien bridge wireless world may 1981 1 and gets the same distortion as his did at 1 khz 0 001 but also at 100 hz and it really is super wicked fast. With a control voltage vg of 0 1 to 2v one can obtain over a decade of tuning range with oscillation frequencies from 200khz to 3mhz in this particular design. Aug 5 2020 adjustable high low frequency sine wave generator low distortion. 1khz sine wave generator.