Search Engine

463 Threads found on Differential Pair
I made a netlist of single ended diff amp but I am not getting right curve between input differential voltage and drain currents of differential pair mosfet M1 and M2. Can anyone tell me where I am wrong... .title'differential amplifier' .option acount=0 default acount=1 Vdd 6 0 DC 1.8V Vss 0 8 DC 1.8V c 5 0 1f (...)
This function can be realized with "differential pair" circuit.There are many information about this circuit and Barrie Gilbert ( Analog Guru ) has developed tons of circuits using with this basic one. If you search the articles of this great man and Chris Toumazou, you'll find very interesting and chic ideas.
Hi everyone! I am trying to layout a common centroid diff pair as below: GND D1 S D2 S D1 S D2 S D1 GND D2 S D1 S D2 S D1 S D2 GND GND D2 S D1 S D2 S D1 S D2 GND D1 S D2 S D1 S D2 S D1 GND but i need help connecting the gates and source and drains such that the layout becomes symmetric! can any one please post me a figure of your own layout
Hello Can anyone help me in designing a common mode feedback circuit (CMFB). I have applied a 100mV DC common mode input voltage at the input of a differential pair with no Ac signal. My fully differential amplifier output common mode DC voltage is 456mV at one end and 450mV DC voltage on the other end of the differential (...)
135454 135455 1)Most opamp use nmos differential amp, but this one uses pmos. why? nmos is faster. 2)the third stage, buffer stage gain, and on the circuit, it shows 2 pmos(m8, m9). why? isn't it inverter is used as buffer? how's 2 pmos is a buffer?
Can any one help me in Understanding the OTA design attached in the picture below. I want to know the purpose of MC, MCN and MCP. I can understand MBN is for biasing but whats the purpose of MBP than? please anyone explain in detail. Thanx
Hi, I want to know if a PCB board is only having differential pairs to route and they are routed on top and bottom side of the board, then is it good practice to put two GROUND plane back to back (signal-ground-ground-signal) in PCB stack? If it is not then please suggest the right way to route the board and right stacking of PCB.
Well the design constraints are the noise, speed, offset and power dissipation. For high speed, you will need minimum length transistors. The noise is mostly dominated by the input differential pair. So you have to do a PNOISE sim and keep increasing the width of input diff pair till you achieve your target. Similar exercise needs to be (...)
Why common centroid technique preferred for differential pair..? if you say it eliminates linear gradients then 1. Please explain what are the linear gradients and which type of mismatch category will it fall..(random/systematic).. 2. How exactly is this common centroid fighting against these linear gradients..? 3. If you can... please stick to
The answer is simple and can be given by thinking quite a bit. Full duplex is only possible with separate communication channels for RX and TX, as e.g. RS-232 has it. Neither LIN (single line) nor CAN (single differential pair) does provide it.
Means you have the amplifier as component with four external resistors defining the gain? You might use current sources to inject an offset current to the inputs, e.g. a differential pair.
Dear all! I'm trying to amplify a differential signal what may vary from a few hundreds of micro-volts to tens of milli-volts. The main challenge is to design this amp in sub 1V and in sub 1?A. I designed OpAmp but won't work with such a low input voltage. The only way I found is to amplify separately these two differential signals (ie. with
How do you do load pull on a differential pair to know the optimum load impedance for the transistor? Do you just use one single transistor instead? A real design (either IC or discrete) will have some coupling between both output transistors, also a non-zero power supply impedance. So the impedance of the differential stage is d
Hello guys, I was reading the 2-stage opamp chapter in Sedra&Smith book when I came across with the ICMR concept. The input diff. pair is a PMOS. They say in there Consider the situation when the two input terminals are tied together and connected to a voltage Vicm. The lowest value of Vicm has to be sufficiently large to keep Q1 and Q2 i
At the higher data rates I recommend you move to the LVDS standard, for which there are CMOS<>LVDS chips for almost any supply voltage you'd like (at least, from 1.8V through 5V). A transmitter at one end (say, 5V), a 100-ohm differential wire pair and a receiver at the other (say, 3.3V). I have found in some ASIC designs that 80MHz with a "5mA
An off state, more accurately called recessive state, is zero volts across the differential pair CANH and CANL, as long as there is a 120 ohm termination resistor.
Google "orcad layout differential pair" to find videos etc. for that. ONe link suggests that it may not do it. However it depends upon what version PCB program you are using I think, what does the help in that program say?
Hello Everyone, I am trying to simulate a multilayer structure in HFSS 13.0. It is made up of copper planes (PCBs) at the top and bottom and 5 layers of different dielectric materials in between. There are two pairs of cylindrical slots one at the top and one at the bottom, through which differential excitation is to be provided. The differentia
Most likely you have a large common mode noise interfering with a differential current source, sense. Try a large CM balun or ferrite sleeve or twin coupled choke to the twisted pair to raise CM impedance and thus CMRR but keep DM impedance relatively low compared to Zc(f) If that fails, reduce area of loop with a smaller gap . water has a diele
I am a bit lost about how to establish the parameters to establish differential pair routing. I am currently trying to route several differential pair and I am a bit new to this. I have searched online some tutorial but I don't find any really explaining **easily and out of the theory** with sipmple succession of steps about (...)