Low Distortion Sine Wave Generator

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.

Low distortion sine wave generator.

The low distortion output includes a 0 dbm output and the thd total harmonic distortion is less than 0 075. Functionally this board uses a wien bridge oscillator that. A do it yourself wien rc bridge sine generator with ultra low distortion in a range almost impossible to measure. This dual channel signal generator offers a 40 mhz sine wave touch screen display with a 16 bit vertical resolution modulation sweep burst.

Schematic of the sine wave oscillator consisting of a low distortion lt1632 based wien bridge oscillator core and an ltc1968 controlled amplitude stabilization loop. The key to creating a low distortion sine wave is the selection of number sequence and pattern of pulses. The output of the ltc1968 equals the rms level of the sine wave divided by 3. Prolific engineer and writer don lancaster developed a mathematical technique to determine the number of pulses and their durations to create a sine wave with minimum harmonic distortion.

There are always distortions of some kind which are described in terms of total harmonic distortion thd. It s called magic sine waves. Sine square wave audio generator features. The lower the thd percentage the closer the electrical output is to a pure sine wave.

Total harmonic distortion thd. Very low idle current draw allows high efficiency even when powering small loads. A thd of zero would equate to a pure sine wave. 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.

Sine and square wave generator 20hz to 150khz in 46 steps low distortion rc oscillator variable output control low battery indicator compact portable lightweight test leads included banana to alligator clip. When a generator produces ac electricity it does not create a pure sine wave. As discussed in the article sinewave generators although a sinewave is the simplest possible waveform it is also one of the hardest to generate in pure form any impurity represents distortion and that means added harmonics that make very low distortion measurements impossible. A low distortion tuneable sine wave oscillator one can make a low distortion tuneable oscillator by incorporating an active filter inside an agc loop.