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Coupled Differential Pair

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23 Threads found on edaboard.com: Coupled Differential Pair
You could use a cross coupled pair for amplification like a strongARM latch.
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 (...)
There is an uncertainty of signal integrity if there is either a common mode noise with an imbalanced pair of signals or a differential noise between the different grounds which may be coupled to each signal. Although this is a simple analog detector, the probability of error depends directly on the SNR and discriminator method. Thus you (...)
what are the benefits of using differential pair cross coupled oscillator or back to back connected oscillator?
Hi everyone, I'm designing an injection-locked LC-VCO with f0=2GHz. The circuit is shown bellow, this is a PMOS-NMOS crossed coupled LC-VCO, the injected signal Vij is put through M1/M2 differential pair. The Vij comes form a LNA in the previous part and a capacitor is in between the LNA and the VCO. I have some questions: (1) The (...)
Hi, I am trying to use "Interactive Diff length tunning" feature of Altium Designer 10 But as soon as I select the option from tools > Interactive Diff length tunning, and click the differential net that i want to length tune, i immediately get an error message that says: " This primitive is not coupled within the max range: 10mils of dif
Can someone please tell me what is meant by an emitter coupled amplifier? For my opinion it is commonly agreed that an "emitter-coupled amplifier" is simply the classical differential pair that also can be seen as "common collector-common base" combination (both with a common emitter node).
Crevars, Here is an app note from polar in regards to edge coupling diff pair. Characteristic impedance, copper thickness and edge coupled lines Regards, eda
Hi, I am just a beginner in layout field. I want to make layout of a differential pair by Common centroid cross-coupled approach. Each of the two transistors have 4 figures. which one of the following is best: ABAB BABA or ABBA BAAB or ABBA ABBA Thnx
Theoretically, yes, if the input stages gets saturated by DC, then the whole mechanism collapse. In practice, comparator are not totally the same as opamp in that we often add differential type cross-coupled latch stage before digital output buffer. And even in cases where input differential pair is not really in linear (...)
What are the analytic equations of the Vos, Ios, CMRR,PSRR of a emitter coupled pair with resistor load and the circuit in the figure ? Or anyone can give me the below papers ? My email : xihuwang@126.com 1. Offset voltage, CMRR and PSRR of a long-tailed pair: an integrated approach 2. Common-mode rejection ratio of differ
Do anybody have the doc about the pci express layout guideline,because the differential line constraint is very strict,and I don't know how the make the pair be coupled when the line is under the BGA pad?
You can use a differential cross coupled pair, i.e 2 transistors with their sources connected together and biased with same current source and the drain of each transistor connected to the base of the other one. You can refer to "RF microelectronics" by Razavi, the oscillators chapter for more details.
calculate impedance as a coplanar edge-coupled differential pair. "The bottom layer has the surface flooded with copper in all open areas as a large ground shield to reduce EMI from high speed signals on inner layers" -i think its not needed for that. if there is a gnd plane immediately above the bottom layer, .
i think always everyone design the VCO to be differential , coz it will be integrated thus the differential signals will be ok , the cross coupled pair is very easy khouly
a better way is to use source coupled rather than differential pair but this comes on the expense of common mode rejection, thermal noise of the degeneration resistors will increase the noise figure, one way is to use inductive degeneration instead resistive one but this will add AREA
Hello, is it possible to get the s4p file for a differential pair (coupled microstrip line) from 2port vector network analyzer measurements. thanks elektr0.
My work need me to compare different topologies, and implement the best to provide 1GHz VCO with low power and low jitter. I am looking at 3 topologies: a) transmission gates + inverter VCO b) current starved VCO c) source coupled VCO so when you said differential pair VCO, do you mean (c) source coupled VCO? (...)
Dear Folks, When I place a coupled stripline circuit component STLCPL2 (I was going through the differential pair example in Designer manual) in Ansoft Designer schematic windows, a dialog popped up asking whether or not to merge layers. Could anyone tell me what does it mean? I looked through the User guide and online help but found (...)
Dear Folks, When I place a coupled stripline circuit component STLCPL2 (I was going through the differential pair example in Designer manual) in Ansoft Designer schematic windows, a dialog popped up asking whether or not to merge layers. Could anyone tell me what does it mean? I looked through the User guide and online help but found (...)