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How to change duty cycle in voltage to frequency converter using LM331???
How to change duty cycle in voltage to frequency converter using LM331
- Thread starter Amol Sakhale
- Start date
Your question does not contain any information, so it can not be answered. You told us nothing about your application. What signal voltage, waveform, amplitude, frequency range, output voltage range - nothing.
Read the datasheet. It has seven circuit designs for different applications and the design equations you need. Pick the one that is closest to your application, modify it to suit your needs, and post the schematic so we can see your work. Then ask questions.
ak
Read the datasheet. It has seven circuit designs for different applications and the design equations you need. Pick the one that is closest to your application, modify it to suit your needs, and post the schematic so we can see your work. Then ask questions.
ak
This device was popular in the early SVGA and multisync monitors, as it can be configured as voltage to frequency or frequency to voltage, so it was used as part of the VGA mode detection from the sync pulse frequency. Monitor schematics from that era are likely to show various ways of connecting this chip.
There were Sharp and Raytheon pin for pin equivalents, but the numbers don't suggest it - so it can take a bit of detective work and a few equivalents charts.
Found this while nosing around: http://www.arrl.org/files/file/QEX_Next_Issue/Mar-Apr 2013/Green.pdf
I'll have a look whether the obscure equivalents jump out at me.
Not sure how good my memory is - but this could be the Raytheon equivalent:
http://www.e2v.com/shared/content/resources/File/documents/QP semi/Ray_FSC_RM4153.pdf
More different numbers for the same chip to look for appnotes under.
