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Design >> Mixed-Signal Design >> Frequency to voltage conveter using digital gates
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Message started by Faiq Khalid Lodhi on Aug 5^th, 2011, 3:05am

Title: Frequency to voltage conveter using digital gates
Post by Faiq Khalid Lodhi on Aug 5^th, 2011, 3:05am

hi every one

can any tell me that how can i convert the frequency into the voltage by using the digital gates only.

Title: Re: Frequency to voltage conveter using digital gates
Post by raja.cedt on Aug 5^th, 2011, 5:26am

you should have some other reference clock, otherwise how frequency wil be detected by only digital gates?

Thanks.

Title: Re: Frequency to voltage conveter using digital gates
Post by loose-electron on Aug 6^th, 2011, 11:51am

Frequency into voltage using digital gates only?

Digital gates don't produce a proportional voltage output, so the question seems a bit flawed.

With a reference clock of some form, you can use counters to determine number of cycles for a defined period of time. That gets you a number that indicates frequency.

With that, you can create a DAC structure that outputs a proportional voltage. A PWM DAC can be made with logic gates mostly, and a LPF.