voltage to frequency converter?

F

fabienduarte

New Member

• Mar 19, 2004

• #1

hi
i need help trying to make a voltage to frequency converter out of just 741 opamps and npn tranisitors. i need to convert 1 volt to 1khz square or triangle wave.
example,
1volt = 1khz
2 volt=2khz
1.5volts=1.5khz

thanks for your help

 

R

Russlk

New Member

• Mar 20, 2004

• #2

Use the LM2917 circuit:
The hash filter is only needed in an automotive application.

 

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F

fabienduarte

New Member

• Mar 21, 2004

• #3

thanks for the reply
but i need to build it out of lm741 op-amps and maybe a few transistors

 

R

Russlk

New Member

• Mar 22, 2004

• #4

Get the National Semiconductor application note AN162, it shows how they make the frequency to voltage converter.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Mar 22, 2004

• #5

Russlk said:

Get the National Semiconductor application note AN162, it shows how they make the frequency to voltage converter.

Click to expand...

The title of this thread is 'Voltage to frequency converter', presumably a VCO (voltage controlled oscillator).

 

R

Russlk

New Member

• Mar 22, 2004

• #6

Oh, right! My dislexia!