High-performance quadrature sine wave oscillator

Published:2011/4/20 2:14:00 Author:Ecco | Keyword: High-performance , quadrature , sine wave , oscillator | From:SeekIC

Many RC oscillators use advanced circuit in phase shift unit. It uses a voltage feedback amplifier, of which the gain will get a sharp decline in a higher frequency and stop oscillation before reaching the desired frequency. That is the reason why voltage feedback amplifier has poor phase characteristics. The RC oscillator composed of high-frequency IC HA5025 with four current-feedback amplifiers will produce four sine waves. The circuit is shown as the chart. CD74AC00 has four NAND gates, when the threshold is bias, four independent amplifiers of HA5025 produce four sine waves, sine wave AC coupled into the input which is used as a sine / square wave converter.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Signal_Processing/Oscillator_Circuit/High_performance_quadrature_sine_wave_oscillator.html

Print this Page | Comments | Reading(3)