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Ring oscillator based ADC f_signal/f_ref ratio (Read 1720 times)
mixed_signal
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Ring oscillator based ADC f_signal/f_ref ratio
Jul 14th, 2012, 8:00pm
 
The counter in a ring oscillator based ADC
counts freq_signal x pulse_width_ref  or time_period_ref x freq_signal. Now if the counter is 10 bits I am wondering if their ratio should be 1024 for 10 bit resolution. If freq_signal=3khz and freq_ref=4khz, how do i make them work?

Shall i use divide by N counters to reduce one make the ratio....or is it done by counting multiple times till the counter is full?
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mixed_signal
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Re: Ring oscillator based ADC f_signal/f_ref ratio
Reply #1 - Jul 15th, 2012, 9:32am
 
Which current controlled ring oscilator has better frequenc v/s current linearity? 3 stage or 5 stage..if possible can anone cite references?
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