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Circuits designed by David Johnson, P.E.
Last Updated on: Thursday, April 07, 2016 02:04 PM

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Period to Voltage Circuits

Active High Pass Filters  -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need… [Hobby Circuit designed by Dave Johnson P.E., 2/11/02]

Active Low Pass Filter Designs  -  This is a collection of inverting and non-inverting active low pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achive any frequency cut-off you may need… [Circuit by David A. Johnson P.E., 12/10/00]

Collection Active High Pass Filters  -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achive any frequency cut-off you may need… [Hobby Circuit designed by Dave Johnson P.E., 2/11/02]

Converts a Square Wave input signal into a Voltage  -  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… [Hobby Circuit designed by David Johnson P.E., 6/04/00]

Form Push-Pull Driver using N-Ch And P-Ch Transistors   -  This circuit can produce high speed output signals with fast rise and full times. The unique change pump action allows the voltage of the upper P-ch device to range from millivolts to hundreds of volts. The output current is only limited by the rating of… [Hobby Circuit designed by David A. Johnson P.E., 6/27/00]

Low Pass Active Filter Designs  -  This is a collection of inverting and non-inverting active low pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achive any frequency cut-off you may need… [Circuit by David A. Johnson P.E., 12/10/00]

Oneshot And Latch Pushbutton  -  This circuit uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal. It can operate from 3v to 18v… [Hobby Circuit designed by Dave Johnson P.E., 3/26/02]

Precision AC Peak Detector  -  This unique circuit uses a very inexpensive voltage comparator to form a peak detector. The DC voltage produced tracks the positive peak of the input signal.  It works from about ten millivolts to about 10 volts peak to peak.  The maximum frequency is about… [Circuit by David A. Johnson P.E., 2/11/02]

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… [Circuit by Dave Johnson P.E., 6/04/00]

Signal 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… [Hobby Circuit designed by David Johnson P.E., 6/04/00]

More  Period to Voltage Circuits

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Dave's Circuits:  Frequency to Voltage     Sine to Square Wave      Voltage Converters    Voltage to Frequency    DC to DC Power Supplies  
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