Title :
A programmable switched-capacitor sinewave generator
Author :
Patangia, H.C. ; Zenone, B.
Author_Institution :
Arkansas Univ., Little Rock, AR, USA
Abstract :
A new switched-capacitor topology is presented to realize a sinewave generator. The circuit architecture is simple and is suitable for monolithic realization. The peak amplitude as well as the frequency of the sinusoid are digitally programmable. The frequency is independent of circuit parameters, and it depends directly on the clock frequency and thus provides stability as well as accuracy. Stability in the peak amplitude is provided by a stable external dc source. Breadboard testing of the circuit has given harmonic distortion of less than 35 dB with ±5% capacitors. Distortion has been reduced to less than 45 dB when the capacitors are adjusted closer to the design values
Keywords :
circuit stability; harmonic distortion; switched capacitor networks; waveform generators; breadboard testing; digitally programmable switched-capacitor sinewave generator; harmonic distortion; monolithic circuit architecture; stability; Circuit stability; Circuit testing; Circuit topology; Clocks; Frequency; Harmonic distortion; Oscillators; Switched capacitor circuits; Switching circuits; Transfer functions;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.519214
