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# Fm Using Vco

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23 Threads found on edaboard.com: Fm Using Vco

## Calculation of random jitter fom phase noise of vco in PLL

I have a 16GHZ pll and div by N is 160. I am trying to calculate random jitter from phase noise of vco. I TRIED IN CADENCE by setting noise source type as jitter and then selecting FM jitter or PM jitter. I was wondering how to plot jitter information using above choices I have made in direct plot form. Also, while calculating Random jitter t

## calculating random jitter in PLL from VCO phase noise

I have a 16GHZ pll and div by N is 160. I am trying to calculate random jitter from phase noise of vco. I TRIED IN CADENCE by setting noise source type as jitter and then selecting FM jitter or PM jitter. I was wondering how to plot jitter information using above choices I have made in direct plot form. Also, while calculating Random jitter t

## FM demodulator using a 4046 PLL

I'm designing -as a hobby project- some IR headphones. When I design anything, I divide the circuit into functional blocks, it allows me to test and debug each independently, before integrating the system. The block I was testing is the classic demodulator circuit using a PLL, and a plain vainilla IC amp, as shown in the image. This schemat

## Osillator test problem(shaking in the spectrum analyze)

There is a FM modulation coming from somewhere.Looks like it.. It may be supply,tuning voltage,load or something else..

## digital FM modulation using VCO and implementing limiter

Hi all, I want to implement a simple communication system with digital FM using vco, but Igot confused about using vco for modulation in matlab! Also, after modulation there are limiter and discriminator blocks, is it necessary to use demodulation matlab function in this system? Finally, for this simple system, can I use (...)

## designing FM MODULATOR BY USING PLL but without using any IC or Chip.

You are going to have a hard time making a PLL without using a PLL "chip"! If you could use a PLL chip, you would choose one with an onboard charge pump. Then you could set up a passive loop filter with a narrow loop bandwidth (perhaps 2 KHz bandwidth) and connect that to the vco tuning port. Then you could also AC couple a modulating signal o

## Jitter analysis settings - Urgent

HI, I am about to finish my 80 MHz Quartz Crystal vco, but I am not confident on Jitter's results. Please try to answer these questions, as fast as you can, as I have the tape-out in August of the full PLL: 1 - For the vco circuits (autonomous circuits), which jitter measurement type should I use: FM or PM (I am using FM)? I think we (...)

## HELP, FM transmitter design

hi, i am building a wireless data transmitter as major project in college, basically i am thinking to design a FM transmitter for transmitting serial data (at max 15 meters). i am using lmx2322 pll and vco (80-100 Mhz), can some one tell me if i put serial data(8 bit) at the input of the transmitter then can i get the serial data at the receiver

## phase lock loop design using 74hc4046

im designing a phase locked loop as a FM demodulator using 74hc4046. Can anyone explain to me what expected output at the output of phase detector and vco. The output signal that I get from vco is exacly the same as the input signal. but oscilloscope show nothing at the output of the phase detector. can anyone tell what might be the problem.

## Ideas for implementing a frequency modulator [hlp]

Hi No one I think the easiest way for implementation of FM modulator is using varactor diods(vco) with a simple oscillator such as colpitts

## FM/FSK demodulation using PLL

PLL FM demodulator

## Problem with FM VCO alignment in FM Radio TEA5757

Hello: I have build a FM radio using STR TEA5757, according Philips Application note AN99041. I have a problem with FM vco alignment. If you align vco coil the tunning voltage should change between 0.8V(88MHz) and 1.9V(108MHz), but in my PCB this isn't happen. If I align my vco coil the tunning voltage is constant in (...)

## frequency modulation and noise

Hello, When using an IDEAL vco in VerilogA to generate a frequency modulated signal, then the instantaneous frequency of that signal is proportional to the modulating input signal. When using VerilogA to measure the period of the FM signal and thus finding the frequency I can sample these values and export them to Matlab to do an FFT. (...)

## FM Demodulator Troubles

Hi, I'm using a 74HC4046A PLL/vco to demodulate mono audio from an FM carrier. The carrier comes from a signal on CAT5e twisted-pair cable. (it rides on the common-mode on one pair which carries video on the differential mode) The carrier frequency is about 250kHz and the amplitude seen by the receiver is about 250mVp-p. Currently I'm modulatin

## Can I make FM modulation using 74ls124?

can i amke FM modulation using 74ls124? if yes how can i make an effecient transmitter using it?

## FM modulation with PLL+VCO

how to modulate a signal (FM) by using a PLL+vco system?

## Tell me if this VCO is very stable!

i'd like to ask something. Is this vco very stable??? mean quick stable time from the on time of the power supply and after a long time (eg. 6hours or more) i've playing with FM TX for some years using vco with ordinary HF transistor and it not so stable :|:| considering using pll, but it

## RF DATA TRANSMITTER FOR ECG SIGNAL ((((((HELP NEEDED)))))!!!

u can use the singal to modulate the vco and then u get FM signal , then in reciver u need FM demodulator to extract the signal or u better convert the signal into digital data by DAC , anf then send it using ISM band chip TX , RX , the digital modulation can be FSK , ASK there are many RF chips working in ISM band , check ti , and analog de

## Questions regarding FM transmitter with PLL

Hey u cannot do frequency modulation with pll.. U can only demodulate fm with plll... So better try using vco or any other method to modulate and use pll to demodulate.. Sure you can if you pick your loop BW right

Look this: And here are schematics of tuner and PLL.

## What is the difference between minicircuits VCO groups?

I am using FM,FSK. which group is better?(linear?) Can we use group 1 with PLL ICs?

## How to Demodulate FSK????

FSK ... FM ... same principle. An F to V converter would work fine. Another method is to lock onto the modulated signal with a PLL. The loop control voltage becomes your demodulated signal.

## what is the FM modulator IC no?

Hi I m working on remote controlled car where I requires FM modulator & Demodulator IC. Can anybody suggest IC no's that requires less hardware or a ckt that can be used in remote controlled vehicle.