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PhD Thesis - Cranfield University

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Type Test- 01<br />

Type tests of the PWM generators used to provide the varying duty cycle PMW signals for<br />

switches T1 to T4. Minimum duty cycle at 20Khz is 0.1 and the maximum duty cycle is 0.89.<br />

+5V<br />

C1<br />

C2<br />

1<br />

2<br />

3<br />

VDD<br />

GPIO5<br />

GPIO4<br />

GPIO0<br />

GPIO1<br />

4 GPIO3 GPIO2 5<br />

PIC12F675<br />

VSS<br />

Schematic<br />

PWM output vs Enable signal<br />

8<br />

7<br />

6<br />

GND<br />

ENABLE PWM<br />

10kΩ<br />

X1<br />

GND<br />

R1<br />

U1<br />

10kΩ<br />

GND<br />

R2<br />

AD REF<br />

10kΩ<br />

+5V<br />

GND<br />

R3

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