13 Threads found on edaboard.com: Charge Pump Simulation Cadence
I am making a design for charge pump and i want to know how can i plot (Iout) i.e. charge pump current, VS the phase difference between Vref and VFB???
another question how can i test the charge pump for having a good performance in a noisy system,i.e. what kind of (...)
Analog IC Design and Layout :: 04.07.2007 12:14 :: ahmed709 :: Replies: 0 :: Views: 687
I need to find the phase noise contributed by a phase/frequency detector + charge pump combination which are part of a frequency synthesizer. When the synthesizer is locked, both the inputs to the PFD are of the same frequency and hence the beat frequency is zero (albeit there will be reference feedthrough). But I cannot do a PSS/P
Analog Circuit Design :: 24.01.2008 07:28 :: nandu :: Replies: 0 :: Views: 1411
Why for charge pump they do Phase Noise analysis "pnoise in cadence"??
As i understand, this simulation for oscillators.
and charge pump doesn't oscillate.
also, after this simulation, i generates dBc/Hz
and dBc is dB carrier,
What is the carrier in this (...)
Analog Circuit Design :: 23.04.2008 21:50 :: mohamedabouzied :: Replies: 2 :: Views: 1062
I am designing a wireless sensor which is very similar with 13.56 Mhz passive RFID which must need a charge pump that harvests power from RF signal in order to feed the rest of components in a chip.
My question is what kind of power (or voltage) you receive on the tag antenna as minimum, but still enough to operate the chip? It will def
RF, Microwave, Antennas and Optics :: 10.04.2009 12:10 :: florescent :: Replies: 0 :: Views: 848
I have designd a charge pump of PLL. And I simulated pnoise of Spectre of cadence. The result of charge pump output noise is larger than 100pA at 1KHz. I don't know what is reason about this? Below is my cirucit and simulation result. :cry: Can anyone help me ?Thank you very much
Analog Circuit Design :: 07.01.2011 03:57 :: wany :: Replies: 3 :: Views: 620
My superviser asked me to find out the relationship of Capcitors, transister on a voltage doubler. I dont know how to do a simulation with different value of capcitance and the ratio of W/L for finding a optimize the power efficiency on circuit pump circuit? Can anyone teach me the method of it? Thank you very much
Analog IC Design and Layout :: 19.05.2006 05:22 :: ringocheng :: Replies: 2 :: Views: 1185
When i do pnoise of a charge pump of a pll,
the output is dBc/Hz
so, it is normalized to the carrier, right?
What is the carrier here?
i understand this simulation for oscillators as there is a sinsoid carrier i normalized w.r.t. it but for charge pump what is the carrier??????? (...)
Analog IC Design and Layout :: 24.04.2008 10:05 :: mohamedabouzied :: Replies: 3 :: Views: 1082
I want to design a type-2 pll which consists of PFD(general), charge pump, passive LPF (2order), LC tank VCO, Feedback Divider N.
I know Icp=50uA, vco gain=40MHz/v, vco output frequency range is 150MHz-220MHz, Z(LFP)=(1+sRC2)/(C1+C2)s(1+sRC1C2/(C1+C2))), then R=10k C1=10nF, C2=39nF.
I calculate: t1=79.6us; t2=390us;and
Loop BW is 9
Analog Circuit Design :: 16.06.2004 05:22 :: hanjiemy :: Replies: 2 :: Views: 1364
One of the best thing I found for PLL was spectreVerilog simulator included in cadence IC environment. But this is true only if you have complex PLL with large digital core. In such case you can replace analog components (VCO, PFD, charge pump ....) with veriloga model, and use verilog model for digital cell. This will allow you to evaluate (...)
Analog IC Design and Layout :: 05.11.2004 01:39 :: eesoko :: Replies: 11 :: Views: 1561
Actually, just the frequency response of the loop filter is not usually enough. The VCO has another pole, besides the usual 1/s. Then if you have something between the charge pump/filter and the vco (V-I converter for example) its frequency response will have to be taken into account too. You can think those secondary effects are at high frequencie
Analog Circuit Design :: 30.04.2005 15:39 :: sutapanaki :: Replies: 16 :: Views: 4064
i want to simulate charge pump ,divider, pfd,which eda tool should i use??
which simulation engine should i use?
RF, Microwave, Antennas and Optics :: 17.02.2006 09:15 :: zhangjavier :: Replies: 7 :: Views: 1233
I have a question about measure input impedence of two port network with cadence SpectreRF. My network consist of capacitors and diodes(a dickson charge pump shown in attachment), you know diode's resistance isn't constant, it depends on the voltage drop on it in certain extent. So when i do SP analyse how can i config the (...)
RF, Microwave, Antennas and Optics :: 06.04.2006 03:21 :: hxr :: Replies: 0 :: Views: 577
digtal PLL: digital PFD+charge pump+LPF+VCO, most porpular now;
all digtal PLL: digital PFD+digital low pass filter+DCO, it have high phase noise, for example, MT4409 from Zarlink;
analog PLL: analog PFD+LPF+VCO.
Analog Circuit Design :: 22.01.2007 20:32 :: butterfish :: Replies: 11 :: Views: 4755