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Adjustable Duty-Cycle Oscillator

Adjustable Duty-Cycle Oscillator

In the study of electronics, the concept of duty-cycle pops up in various places such as digital circuits, one-shots, switching regulators, and DA converters to mention a few. Lab experiments to examine duty-cycle usually require two parts- a square-wave oscillator driving a monostable multivibrator (one shot).

http://www.elexp.com/t_oscill.htm

Current-feedback amp yields simple oscillator

Current-feedback amp yields simple oscillator

handful of components configures a current-feedback op amp as a large-amplitude sine-wave oscillator with independent adjustment of amplitude and frequency

http://www.edn.com/archives/1995/060895/12di5.htm

Micropower CMOS oscillator, draws only 0.5ua

Micropower CMOS oscillator, draws only 0.5ua

this circuit draws a mere 500nA from a 6v battery. It uses a very inexpensive C-MOS IC to produce a frequency of 2Hz. However, by changing the component values you can push it to 300Hz.

http://www.imagineeringezine.com/PDF-FILES/500na0.pdf

Precision ultra low power oscillator

Precision ultra low power oscillator

works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery, highly stable under varying temperature and supply voltages

http://www.imagineeringezine.com/PDF-FILES/10secosc.pdf

Programmable oscillator uses digital potentiometers

Programmable oscillator uses digital potentiometers

This Design Idea describes an oscillator in which setting the resistance of two digital potentiometers independently programs the oscillation amplitude and frequency. This design idea uses diode-stabilized Wien-bridge oscillator that generates accurate si

http://www.edn.com/article/CA198897.html