13 Threads found on edaboard.com: Pll As Demodulator
I am looking for an IC similar to 565 or 4046 to use as pll to demodulate FM broadcast signals.
(The problem is that the 565 is obsolete and I cant find any place around to buy some. the problem with 4046 is that it works with square wave and I need to have it worked by sinusoidal wave)
If you know other IC which are available in the m
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-03-2013 19:20 :: user105 :: Replies: 2 :: Views: 1257
Our circuit for 16-QAM MODEM with Dpll as its demodulator in simulink is showing a number of errors.Please help us with the circuit design.
Digital Signal Processing :: 03-14-2011 06:25 :: punam.ect :: Replies: 0 :: Views: 787
For FM demodulation: If modulation index is low (max. phase deviation less than 1 radian), you could use a narrow-band pll as a phase demodulator. The output is the ouput of the phase detector, that after derivation gives the frequency.
This can work for low-index FM but not for FSK.
Why do you need a method other than take the control voltage o
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-22-2010 11:36 :: zorro :: Replies: 1 :: Views: 1376
In my opinion, the correct topic is FM-demodulation rather than spectral analysis. The problem can't be solved however without considering the characteristics of the baseband signal. As another point, the demodulator should be almost invariant to a varying carrier level. The most promising FM-demodulation methods are based on a pll tracking the car
Digital Signal Processing :: 09-02-2009 06:07 :: FvM :: Replies: 4 :: Views: 1023
I have a theoretical question thats got be a bit stumped
It reads as follows:
"Design a frequency demodulator based on CD4046 pll. Use phase comparator R1 ≥ 5 kΩ, Rs ≤ 1 MΩ, C1 = 220 pF, VDD =+5 V, fO = 80 kHz,
C2 = 270 pF, fL = fC= ?40 kHz.
Elementary Electronic Questions :: 10-23-2008 17:16 :: T47 :: Replies: 2 :: Views: 6492
want to design a transmitter/receiver pair communicating via FSK modulation. I decided to design the transmitter side by a VCO. And I plan using LM565 on the receiver side.
At this point I need an explanat
RF, Microwave, Antennas and Optics :: 07-21-2008 14:36 :: hkBattousai :: Replies: 8 :: Views: 18420
only I/Q can give you phase information, if you want to demodulator signal from phase information, then you need I/Q, else only I or Q is needed such as FSK demodulator with pll.
Digital communication :: 10-02-2007 06:38 :: wwfhm2002 :: Replies: 2 :: Views: 1795
You can try to simulate it in ADS using the ptolomy with ENV method. Please be sure noise sources are included in your pll blocks.
Analog Circuit Design :: 08-19-2007 01:28 :: hmsheng :: Replies: 6 :: Views: 2063
We using FM pll demodulator with a data slicer as FSK demodulator, my question is what is it a coherent demodulator or non-coherent demodulator?
And FSK demodulator has two another method:
1: general band pass filter and envelope comparator
2: match filter BPF and envelope comparator (...)
Digital communication :: 06-24-2007 23:16 :: wwfhm2002 :: Replies: 2 :: Views: 2137
I want to callibrate a pll(74HC4046AN) as part of an mfsk demodulator for my diploma thesis.
17 different frequencies which correspond to 17 different analog voltages get in the phase
comparator. The pll have to lock each time at different frequency. I have tryed any
combination for RC filter but the best result is as shown at this (...)
Analog Circuit Design :: 09-29-2006 08:52 :: stsiligg :: Replies: 4 :: Views: 1609
it will depend on the pll usage
if u will use it as frequency synthizer the phase noise will be ur major target , and loop speed "settling time" , and for sure stabilty
if u will use it as demodulator the loop bandwidth , and speed will be ur major concern , and so on
Analog Circuit Design :: 04-22-2006 19:37 :: khouly :: Replies: 11 :: Views: 1210
Therez lots of info on this Board itself.
Search for "pll" or Phase Lock in the Books upload/download or IEEE study papers.
Digital communication :: 05-04-2006 01:47 :: Renjith :: Replies: 6 :: Views: 2271
Try this link:
Elementary Electronic Questions :: 01-29-2006 20:46 :: IanP :: Replies: 6 :: Views: 2053