ZSCT1555 Просмотр технического описания (PDF) - Zetex => Diodes

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ZSCT1555

PRECISION SINGLE CELL TIMER

Zetex => Diodes 

ZSCT1555

Figure 9 gives an easy selection for RA, RB and

CT values.

Figure 11 shows the result of modulation with

a triangle wave input to the control pin.

100

100k

10

1M

1

10M

0.1

0.01

(RA+2RB)

0.001

0.1 1

10 100 1k 10k

Free Running Frequency (Hz)

Figure 9

100k

Similar to the PWM circuit of Figure 5 the astable

circuit can be configured with modulation of the

control input as shown in Figure 10. The result is a

pulse position modulated, PPM, circuit where the

pulse position is altered by the control input voltage.

Figure 11

Figure 10

Issue 3 - July 2006

© Zetex Semiconductors plc 2006

www.zetex.com

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