CD4046 Ten Times 10× Frequency Multiplier Circuit
For 1Hz to 1KHz input range, we design a VCO to cover 10Hz to 10KHz, with some extra range on each end. the VCO output is divided by 10 and then compared to the input signal using the wideband phase detector. The phase-detector output goes to the loop filter and then reaches around and closes the loop by running the VCO.
| PARTS LIST | |
| R1 | 100kΩ |
| R2 | 10kΩ |
| R3 | 6.8kΩ |
| C1 | 1µF |
| C2 | 0.01µF |
| IC1 | 4046 |
| IC2 | 7490 |
In this circuit, the CD4046 is set up so that the VCO operates at 10Hz 10 10KHz. The output pin (4) is fed back to a ÷10 counter.
4046 PIN Configuration
When the input frequency is 1/10 the output, lockup will occur.
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please,post circuit IC 555.thank
Is this circuit also for audio signals??
the cap across the batetry is a tank it is there to assur that the ripple current is not affected by the internal resistance of the batetrythe cap across the 7805 is a discharge cap, and it reduces ripple voltage Was this answer helpful?
Hi, I would Like to get the schematics of PWM circuit operating a 20 Ghz frequency 1200 v DC. With an input of 12v DC
Will this circuit operate on +12V as well?
HI..
isn’t it posible when Finput is pluse circuit?
sir,
i want to use 4046 ic for wireless fm demodulation….but the problem is that maximum free running frequency available with any such ic is only 2Mhz…at this frequency, antenna length required will be very high……i want to demodulate fm of around 50Mhz…plz suggest suitable pll ic for that
Hi,
Is it possible to this diagram somewhere put potenciometer or something like that to make input signal not 10 times bigger but 2, 3 times.. it would the best if it can be variable with potenciometer.
Thanks
sir could you please tell me how to set the CD4046 to get 900MHz frequency for input 10MHz frequency