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Design of a CMOS Sawtooth-Wave Oscillator Circuit t0 l8 ?7 t7 P8 q& {9 J+ E
MA Tian-hua , J IANGGuo-ping ,WANG Li8 \* V% _# d* ?7 L! j
(School of Electronic Engineer ing , Dalian University of Technology ,Dalian Liaoning 1 1 60 2 3 , China)& ~$ v- u- ?. j2 e: o$ _4 |
Abstract :A Sawtooth - Wave Oscillator Circuit based on 1 .2 μm CMOS technology is designed .On& a; \4 w2 s% B# f" |! G
being designed ,comparator is regarded as a key circuit ,meanwhile , the method of constant current
9 r5 o2 G; }7 K& H* K3 usource charging and discharging is used . Of course , the design of each component circuit is also explained
~/ a" }' P5 N; O ~$ T, \- w.The oscillator circuit is emulated by using the tool of Cadence SpectreS .It shows that the oscillating6 A5 ?3 v+ f5 u; t8 P( | h
frequency has a good characteristic of linearity .When the power voltage is 5 .0 V or so, the
6 `* f/ N7 S5 P8 c3 a. vfrequency is stable ,so does it from 27℃ to 55℃ .Because of the better performances with the change
$ q0 F( c( Q' g0 wof appropriate supply voltage and temperature , this Oscillator Circuit can be widely used in many; B, l( L, r* G3 Y
kinds of electronic circuits .
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0 {- n* M' m0 G& |, f回覆後 可以下載PDF附件 權限20 & 2RDB. d! k/ K% ~2 M4 T# U
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