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Converters:
Period to Voltage
Converters -- Main
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Last Updated on:
Friday, October 16, 2009 03:41 AM |
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| Circuits
Designed by Dave Johnson, P.E. : |
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PULSE PERIOD TO VOLTAGE CONVERTER
This is a test circuit converts a square wave input signal into a voltage.
But, the voltage produced is proportional to the time between edges (period) of
the signal, not the frequency. The range is from 100uS to to 10mS, which
produces a voltage from 100mV to 10 volts. Other scale factors are also
possible. The circuit is powered from single 15v supply and uses inexpensive
parts. It is great when a signal's period instead of its frequency needs to be
monitored.
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Links to electronic
circuits, electronic schematics, designs for engineers, hobbyists, students &
inventors:
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555 Makes Handy Voltage to time Converter - 02/01/01 EDN-Design Ideas: The
circuit in Figure 1 is a simple, low-cost voltage-to-time converter using
ubiquitous 555 timer chip. You can use IC's monostable multivibrator as a
voltage-to-time converter by connecting analog-voltage input to
charging resistor, R, instead of connecting R to VCC. With this
modification,.....(design idea added 05/03) |
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Circuit Converts Pulse Width to Voltage - 10/25/01 EDN-Design Ideas: The
circuit in Figure 1 converts pulse information to a clean dc voltage by the end of
a single incoming pulse. In another technique, an RC filter can convert a PWM
signal to an averaged dc voltage, but this method is slow in responding.
Converting low-duty-cycle pulse information is slower yet.....(design idea added
1/05) |
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Pulse Period to Voltage Converter - This is a test circuit converts a square
wave input signal into a voltage. But, the voltage produced is proportional to the
time between edges (period) of the signal, not the frequency. The range is from
100uS to to 10mS, which produces a voltage from 100mV to 10 volts. Other scale
factors are also possible. The circuit is powered from single 15v supply and uses
inexpensive parts. It is great when a signal's period instead of its frequency
needs to be monitored. Published in Electronic Design, Sept 27, 1990. ….(designed
by David A. Johnson) |
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Converter Ignores Power Supply Variations - 01/05/95 EDN-Design Ideas: (design
idea added 02/05) |
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