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# Questions tagged [gain-bandwidth-product]

the product of the amplifier's bandwidth and the gain at which the bandwidth is measured.

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47 views

### Finding a gain bandwidth product using a test frequency

For GBP datasheet parameters of Op-amps, I have seen datasheets with test conditions like gain and Rl, but there are also datasheets with ftest as their conditions. How do we calculate the GBP of the ...
31 views

### CA3140 wideband output amplifier

The following circuit is nearly exactly what I need for the output stage of my function generator: datasheet: https://www.renesas.com/us/en/www/doc/datasheet/ca3140-a.pdf What I don't understand is ...
170 views

### What's the largest practical stable gain possible?

I have a feedback application to set the voltage of a node in which there is considerable loss in the loop. Simulations tell me that a differential voltage gain of 10000, 80dB (roughly about what you ...
73 views

### What does the condition “f=100Hz” mean for the Gain Bandwidth Product?

In the LT6003 datasheet you can find the following information: How do I read the Gain Bandwidth Product? I mean there is a typical bandwidth of 2kHz under the condition of f=100Hz and I'm not sure ...
32 views

### Gain bandwidth product of amplifier in a DC scenario

I think I have a simple (but still to me confusing) question regarding the gain bandwidth product (GBP) of an instrumentation amplifier: Datasheet (AD8237) I have sensors that change their output ...
217 views

### Why Gain-Bandwidth Product of devices having a simple one-pole frequency response is constant?

I was reading wikipedia page of Gain-Bandwidth Product and got struck at one particular statement. For devices such as operational amplifiers that are designed to have a simple one-pole frequency ...
80 views

### Wrongly documented TI LM324 unity-gain bandwidth?

I was reading the datasheet of the LM324 from TI (http://www.ti.com/lit/ds/symlink/lm324.pdf). They specify a generic GBW of 1.2MHz. This is usually done with no output applied, from what I ...
156 views

### Maximum Gain For Chopper Stabilized Instrumentation Amp (MCP6N11)

I am using a Microchip MCP6N11 chopper stabilized instrumentation amplifier to amplify the signal from a MPX2300DT1 Wheatstone bridge pressure sensor. My schematic is attached. As shown the gain is ...
281 views

### gain of opamp circuit with current output

I'm designing a current source using a MOSFET driven by an opamp. The opamp controls the gate by comparing the voltage on a shunt resistor to the input reference. You could say that the fet replaces ...
700 views

### OPA211 weird frequency response — why?

I'm using an OPA211 in differential mode with unity gain; no external compensation. I'm getting a puzzling ~10MHz bandwidth (specs indicate a bandwidth of 45MHz at G=1) with a peak at 8MHz (consistent ...
2k views

### Understanding of Dominant Pole Compensation

According to Miller Effect, within amplifying devices such as transistors that have inverting voltage gain higher that one, there should be increased input capacitance with increased voltage gain of ...
96 views

### Influence of NFB on the Gain of Amplifier

NFB is an acronym for negative feedback. Lets say that we have an amplifier with three stages: input (differential) stage followed by voltage amplification stage and output power stage. And we have a ...
460 views

### OpAmp Design Questions for Transimpedance Amplifier

I'm trying to improve on a transimpedance amplifier design by changing out the op-amp that I'm currently using for another one. The issue I'm facing now is that I'm unsure as to how to pick a good op-...
210 views

### Finding the frequency of opamp to get a specific voltage gain

In the following question, they ask for the frequency at which the gain would be 1.41 V/V. The dc or low frequency closed loop gain is 2V/V (6 dB). Is the solution of the following question done ...
254 views

### Gain-Bandwidth of LTC6409

I am planning to use a differential amplifier, LTC6409 which is reported to have a GBW of 10GHz. I ran an AC analysis on LTSpice using the Spice model given here. I connected the negative input to ...
3k views

### Gain-bandwidth product proof for open loop/closed loop opamp

On the forum, post #12, Ghar claimed that the proof gain-bandwidth product from wikipedia is awful and he gave another proof but with feedback. https://en.wikipedia.org/wiki/Gain%E2%80%...
104 views

### Parameters of a current sense amplifier

I am trying to select a current sense amplifier for my design. My design parameters are :- Vrail:- 9V to 21V ILoad :- 20A(max) When I look on digikey, http://www.digikey.com/product-search/en/...