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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28 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 ...
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5answers
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 ...
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2answers
154 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 ...
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2answers
68 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 ...
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0answers
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 ...
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2answers
190 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 ...
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2answers
427 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-...
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2answers
70 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 ...
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147 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 ...
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1answer
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%...
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2answers
258 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 ...
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4answers
693 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 ...
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0answers
83 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 ...
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0answers
196 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 ...
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1answer
241 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 ...
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4answers
13k views

Bandwidth of inverting and non-inverting op-amps

If the same op-amp is used in both inverting and non-inverting modes (with same closed loop gain using appropriate resistors), will the closed loop bandwidth of the op-amp in both cases be the same? ...
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102 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/...
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2answers
1k views

Understanding Op-Amp gain bandwidth product

Below is the schmatics and AC transfer function for transimpedance amplifier from this design. According to the datasheet, OpAmp has the gain bandwidth product of 20MHz. But, here the gain is 94.58 ...