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124 Threads found on High Gain High Bandwidth
Your opamp is very simple and is missing a voltage gain stage so its voltage gain will be low. Its supply voltage and operating current are extremely low. Its bandwidth and slew rate are very high for an opamp. The resistor values must be fairly low for operation at the VHF frequencies due to stray (...)
In top of this, should be mentioned that usually the high pass filter is placed at the input, and the low pass filter should be placed at the output of the amplifier.
Hi, I wanna build 2-stage OpAmp with feedforward compensation. Let me start with the basics: Let's assume I have two ideal transistors with intrinsic gains a1,a2 and certain GBW1,GBW2. Let's assume both parameters are comparable and I connect them in series then I have gain a1*a2 and bandwidth sqrt(sqrt(2)-1)*GBW1 = 0.64*GBW1. Nothing (...)
I need an integrator that will handle +100v output. This is a serious problem due to the lack of high voltage opamps. It's my understanding that integrators need to be unity gain stable. Would this opamp work? It seems to show unity gain capability under the "gain and compensatio
A loudspeaker has a strong resonance. It causes sounds to be "boomy". Therefore modern audio amplifiers use a fairly high open-loop voltage gain and a lot of negative feedback to reduce the gain to a useable amount, reduce distortion a lot, increase the bandwidth and reduce the output impedance a lot. The (...)
Low frequencies have their gain reduced when a coupling capacitor has a higher reactance than the resistance it feeds. high frequencies have their gain reduced when the output impedance of a transistor is loaded with a capacitance with a reactance that is lower. The capacitance can be the (...)
1/RoCo is not the op amp bandwidth unless the load is dominant. Not a good way to bet. Often the BW is set by internal compensation in unity-gain stable or "gain of X stable" op amps. Because voltage mode op amps want high stage gain and low power, Ro is made (...)
You do not make the output resistance "more bigger" (higher). Instead for more gain you make the negative feedback resistance higher. An opamp has a frequency compensation capacitor to reduce the gain at high frequencies so that its phase shift does not (...)
the lower FET is provide high impedance gain of RL/R or impedance reduction to drive load RL, while the upper allows full bandwidth at unity gain for modulation. Thermal noise increases with power loss so higher transconductance reduces noise and losses.
Two stage opamps are normally used to enhance the gain of opamp as one stage can not provide high gain. However, there is a compromise, higher the number of stages, higher the number of parasitic poles, Therefore, it is more difficult to stabilize the opamp (...)
I am looking at building a Pre-Amp that has a high impedance due to having a high impedance load (Like that of most Piezoelectric Elements). My biggest issue with this is that it needs to feed an ADC that is unipolar but can be either single ended or differential. The circuit also requires bandwidth from (...)
Any negative feedback regulator or unity gain Op Amp has low output impedance at DC which rises with f as feedback decreases from lack of gain-bandwidth. Capacitors can have lower impedance Zc=1/ωC up to the series resonant frequency, (SRF) Yes, decap does have lower impedan
Hello. While reading comments about a circuit on a site a short talk about the usable frequency range of the meter circuit, and someone said that TL074 should work to about 2MHz(slew rate = 13/?S) and that using AD843 which has a slew rate = 250V/?S would increase the bandwidth to 20MHz. I don't understand the relationship or how to do the n
A REAL radio has many tuned circuits or crystal filters for excellent selectivity, a wide bandwidth and low distortion. It has high gain for good sensitivity and has automatic gain control and good design so that strong local stations do not overload it. A super-regen "radio" is very simple and has only a (...)
The bottom limit is defined by noise. If you measure a DC voltage, check the opamp 1/f noise and use a low-pass filter to limit noise bandwidth. You also have to define the input impedance to refer the noise power and voltage. The higher the imedance, the higher the noise level. If you refer to audio (...)
Patch is directional antenna. so there will be more gain. but coverage area gets lower. I do not see problems if lower band bandwidth gets transferred to high band by means of converters (up/down). sorry if my understand on the problems differs with yours. Regards.
The word is [b[product, not produit. Product in English means to multiply so gain-bandwidth is a number that is the gain times the bandwidth. The gain of opamps is very high at very low frequencies and their bandwidth where the gain is only (...)
No real OP has infinite CMRR or SR. It has high (open loop) voltage gain by design, according to it's working principle.
C1,C2 appear to be LPF at 200KHz which may improve AM radio rejection but the positive feedback resistor, I am not sure about. Since EEG is ULF band why not remove this and change the gain to 500 instead to reduce the bandwidth to act as LPF. Also since common mode noise will be high , include an ac cm choke on all (...)
1. FET shows poor performance at high frequency 2. FET has small gain-bandwidth compared to BJT 3. FET shows poor voltage gain 4. FET can be operated only in low power applications