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176 Threads found on Sense Amplifier
My question was about skew not about slew ?? something like skewing in sense amplifier
The gate has to be held slightly negative in the cases I have seen, and the right answer varies with temperature, "make" tolerances and so on. One approach I have seen is to sense the voltage across the drain impedance and servo that through a poor-boy op amp to maintain a constant drain current (against an external reference). Of course if the l
Hi, use a "high side current sense amplifier" There are many different types from many different manufacturers. Read through some datasheets and application notes. Klaus
Hi, You write "LM328". I assume you mean LM358. I don't think the LED driving circuit makes sense. What exactely do you expect? How do you measure it? And what results do you see? Klaus
In a sense, the higher the switching frequency, the greater propagation mightiness of the signal. Since switched power supplies use inductors as part of the charge transfer process, even though they have good shielding, there is always a leakage in the magnetic field beyond the component body.
Hi all, I want to measure ultra low current (couple of nano ampere). Is there any special technique to measure such low currents or differntial voltage measurement across a series resistor (Rsense) will do ? Suggestions to select appropriate operational amplifier for low current measurment are required. Thank you in advance. Regard
The second schematic doesn't make sense as shown, it misses a connector for the feedback path. To understand if the loop layout has any relevance for the amplifier performance, some basic parameters must be known like: - amplifier and signal bandwidth - resistor values I guess, each topology can be useful under specific circumstances.
Does turning off signal generator output cause the output to become floating? This question is specific to op-amps. However, I guess it can encompass digital as well as analog ICs. As a general rule, this make sense if the input stage of the amplifier is based on high impedance devices such as JFET tech
My application is not microphone. I use the opamp to sense a current. The current source is non-idea with not not large impedance, so my current sense opamp should have low input impedance. Thanks.
The problem description doesn't make much sense yet. You say to measure nA "near DC" current but have 100 ohm Rin "due to timing constraints". These are simply incompatible specifications. It's almost purposeless to drive a TIA with 100 ohm source impedance. Perhaps you can clarify the problem with a schematic?
I have a current sense resistor whose one terminal is ground itself. But the resistor is in a noisy area so I have used differential routing. I was wondering whether differential mode amplification will be of any good for suppressing noise and ground bounce. Please note that one of the input of the differential amplifier is ground itself. Does t
hello i am working on low side current sense by .1ohm,5watt resistor. my project is 3 phase ac induction motor control and resistor is placed on negative dc rail of dc bus. i am getting voltage drop across the current sense resistor then filter and amplify by non inverting dc amplifier by A=10 the thing is i am getting sharp (...)
Hi, In a paper I found the use of an OTA+buffer ("opamp") as a baseband amplifier after the mixer. It uses resistive feedback and the source resistance is given by a series of the antenna and the switch impedance of the mixer. To first order, the amplifier can be descried as the ordinary "inverting opamp amplifier":
need an IC to sense 0-5A with a resolution of atleast 0.01 Amps and the sensor should use a shunt current sense resistor preferrably from texas instruments
Hi Vadim - There are several different "layers" to the design of switches - are you asking about designing at a schematic level, or layout level (metal/via layouts to achieve low Rdson and satisfying EM rules, sense device design, bond pads locations, etc.), or basic device level (doping profiles, process integration, optimizing resistance vs bre
Opamp: One differential input pair, one single ended output, very high open loop gain (practically infinite at DC) Differential amps: In a technical sense, Opamps are differential amplifiers. But when an amplifier is referred to as "differential" it's usually referring to differential outputs, which typical opamps don't have. Sometimes (...)
From the text book notes attached, the loop gain is given which makes sense but I don't see how I can incorporate the closed loop gain and bandwidth given using this transfer function to satisfy the requirements. 116937116936116935
I want to know that if i will create a 6T sram array of 2x2 then if i want to calculate the power dissipation then how can i do this? i know how to calculate the power dissipation for the cell. but i want to know that how to calculate power dissipation for the array means for the architecture including sense amplifier,write column circuit,row decod
The control topology makes no sense. You can either operate the system with current or voltage controlled feedback. But what's the purpose of substracting voltage and a current proportional value?
Hi. I'm trying to design the following sense-amplifier Flip-Flop 113896 I'm using TSMC 90nm CMOS technology, and I'm having troubles doing the design. I'm not getting what I expect at the output node. Can anyone give me some ideas about the correcto sizing of the transistors? I'm trying to achieve a low metastability reg