一種CMOS鋸齒波振蕩電路的設計[簡]

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Design of a CMOS Sawtooth-Wave Oscillator Circuit
MA Tian-hua , J IANGGuo-ping ,WANG Li
5 K/ ~) h% G) T$ }(School of Electronic Engineer ing , Dalian University of Technology ,Dalian Liaoning 1 1 60 2 3 , China)
% b8 v5 y  N9 K8 JAbstract :A Sawtooth - Wave Oscillator Circuit based on 1 .2 μm CMOS technology is designed .On
3 X, |8 u. u! v& q9 h& mbeing designed ,comparator is regarded as a key circuit ,meanwhile , the method of constant current
+ W; d4 F- f+ d, J0 Csource charging and discharging is used . Of course , the design of each component circuit is also explained
.The oscillator circuit is emulated by using the tool of Cadence SpectreS .It shows that the oscillating
3 u- ]- L& D0 g& Efrequency has a good characteristic of linearity .When the power voltage is 5 .0 V or so, the
+ r0 u! c9 a/ e& s! Yfrequency is stable ,so does it from 27℃ to 55℃ .Because of the better performances with the change
of appropriate supply voltage and temperature , this Oscillator Circuit can be widely used in many
kinds of electronic circuits .
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