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bnc cabling problem
I want very high SNR signal source. Signal gererator generate the signal , The signal travell through the BNC cable to my circuit. How can I transfer the single ended signal to differential ended signal with balanced input impedence. Transformer is a choice, but I need low...
need u help on this current limit analysis
I have ever designed LDO by using a scaled down PMOS to sense the current not resistor to sense it.
The sensing pmos monitor the gate of pass pmos to get the ratio current of loading current. I haven't seen the current sense of your circuit.
50uV, which point do you refer to.
Why not filter power first or you can use a high performance power supply.
You can get rid of the noise in power supply. The problem is, what's your noise level of OA, whether it
exceed your offset, if yes, you should watch is it in high frequency or low...
Which frequency range do you care?
I think you need to control the Equivalent intput Noise (RMS) to <=11uV, not output noise.
Large input transistor size, or chopper.
From the gain plot of 5V, I can calculate the phase margin.
PM=180-90-arctg(0.1)+arctg(0.01)=84.6
arctg(0.1) for the contribution of second pole, arctg(0.01) for zero.
I think the poor gain is because the cascode transistor works in linear region, in 5V condition. Because both 3V and 5V have...
I agree with n1cm0c, RTL range from zero to infinite, gm will decrease, and the main pole almost not changed with RTL， so the phase margin will increase, the system will be more stable.
But why not use miller compensation to stablize the OA. What's the advantage of this structure?
There's no problem in your circuit, I think you can try another tool to simulate AC respose. Maybe it's just a bug in your tool. And you can try other different Vdd in your tool.
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