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96 Threads found on And Matching And Differential
Hi everybody, I am trying to design opamp circuits, but I couldn't fully understand how to find input and output impedance of an Opamp circuit. When the configuration is Non-Inverting, input impedance of the circuit is High-Impedance and for impedance matching I may (...)
Hello, As we are following 50Ohm impedance in single ended signals and 100Ohm impedance differential signals in routing. My question is in routing differential like Clock+ and Clock- we follow 100Ohm differential impedance. Is it necessary to follow 50Ohm for (...)
Hi guys I am designing the layout of a a differential amplifier in cadence virtuoso layout xl and technology node is 40 nm. This reqyuires matching of two nmos devices. suppose i made an array of 4x4 to macth two nmos devices, then according to the rule of 40 nm global foundries, how many dummy layers surrounding the main (...)
The standard is clearly specifying voltage into load, not open circuit transmitter voltage.
For starters, this is RF so you should not be trying to drive a capacitive load but a matching network with a better characteristic. I would also say you'd be lucky to get a complementary amplifier to work, but a real differencing amplifier with the output also true differential to me seems less likely. and feedback any (...)
hello, I am trying to attach a power amplifier to the NFC chip so I could read out from distance (~30cm). I though it would be quite simple but it does not work and drive me crazy.. Here is the circuit and block diagram I designed. Would anyone could comment what I am doing wrong? For now, I use CR95HF as a reader (...)
I'm trying to match AD9361 differential RX at 1.3 GHz. I've got the S11 parameters for the RX LNA at 1.3 GHz: freq magS11 angS11 1300000000 0.453016055876785 -82.7105506901038 I'm matching this to the balanced input of a balun. Am I right in thinking that the way to design the balanced i
Hi, I have this battery and i want to monitor each cell Voltage , but how i can monitor each cell Voltage in parallel you .
Those are two amplifiers that are not related other than they are both amplifiers. LNA means the amplifier is specifically designed for low noise. It's other characteristics are not defined by that designation and they generally aren't differential. Impedance matching can help improve the signal to noise ratio since it (...)
Thanks in advance. Can any tell me how to match analog circuits to 50 ohm line.. Lets say i have a differential buffer amplifier, and now i want to match the buffer to 50 ohm line. Effectively , gain=0dB, input impedance=100 ohm, output impedance=100 ohm and the (...)
i have designed two stage fully differential OPAMP. i have theoretically calculated output swing, it is coming 172mV to 945mV. power supply is 1.2V in 65nm technology. for checking in voltage swing in simulation i have connected it like a buffer and input sweeped fron 0 to vdd. but output is not tracking input at all. i m attaching plots. (...)
yes if you insert dummy means you should add equivalent schematic instances and connect it as same as your layout LVS takes this into account. LVS takes these devices as normal devices it doesn't know these are dummies.
Offset voltage reduces inversely proportional with the size of the (symmetrical and adjacently placed) differential input transistors, s. Pelgrom's well known paper "Transistor matching in analog CMOS applications", which you can find here in this post.
Hello I simulated a loop antenna working at 2.2 GHz, in HFSS using lumped port. I want to make this antenna and it has a input impedance equal to 200+j0 at its resonance freq. shall I use a balun and if yes can you help me what kind of balun should be used?
If the current gain is not equal, a differential output voltage will exist for an equal input current. This is even more important if only a single ended output is used and current mirrors are used with a different Vbe characteristic. Some more info here
Natural matching of devices lets you take advantage of differential architectures, compensate one voltage drop for another, depend on even division-ratios and so on. The "goodness" of that matching then becomes a concern.
Hi, Advantages of inter-digitization gives each finger of the gate the same effects. Keep in mind that you must add spares onto the end so that the end finger "sees" the same as a finger in the middle of the row. Keeping the inputs of a differential pair the same length in also expected. The disadvantages of inter-digitization is that for high sp
differential-pairs (e.g. for op-amps or OTAs) and current-mirrors are more examples of where matching can be critical. IC processing cannot create perfect uniformity or accuracy of lithography in both horizontal and vertical directions, and there can be (...)
Modern 4-Ports VNAs can handle to measure differential impedances.For instance, consider an differential amplifier,each input/ouput is connected to one port of the VNAs inputs/ouputs using single ended cables and connectors.VNA calculate differential s-parameters from mixed (...)
Hi, now i designing differential mixer. so there are two input node and each node designed to 50ohm input matching. when i do matching each node i connected to 2 differences port and made adjustment to get 50 ohm. but i got saw few thesis the input (...)