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Re: Powerclamp
Power Clamps allows to create a current path to discharge the power supply rails during ESD events (electro static discharge).
It limits the VDD/GND voltage to the supply value during ESD events.
Are you sure to use the right MOS type for your input level?
When you want to pass a high voltage signal, you must use an PMOS switch with a gate clock low, and conversly, when you have to pass a low voltage, a NMOS switch is required together with a high level clock, so as to optimize the VGS...
Re: Buffer for LDO
You may look at:
A low-voltage, low quiescent current, low drop-out regulator
Rincon-Mora, G.A. Allen, P.E.
Stand. Linear Design Branch, Texas Instrum. Inc., Dallas, TX, USA;
This paper appears in: Solid-State Circuits, IEEE Journal of
Publication Date: Jan. 1998...
verilog code for sar
Hi,
I'm a pure analog designer, and I'm now facing my limits with digital issues. I have designed a complete 8 bit charge redistribution SAR ADC. I made up the sar (successive approximation register) by hand, i.e. by instanciating gates in schematic.
However, I'm looking...
Re: INL/DNL of Nyquist ADC
DNL < -1LSB does not mean that a code is missing. But it implies that the converter is not monotonic. Which may be a serious matter in closed loop applications such as regulation.
The extracted view includes different layers than layout one. Maybe you haven't loaded them in your LSW. Try to load all the available layers in the LSW.
folded cascode op amp .pdf
To obtain gains as high as 80dB, a two stage amplifier seems more convenient. You may use a folded cascode as the first stage (easily 40 to 50dB), and add 30dB more with a common source second stage (with Miller compensation).
Re: breakdown
In fact Breakdown refer to voltage rather than current.
The braekdown voltage is the voltage over which the electric field under the oxyde is too high, and thus the oxyde breaks down and destroy the tansistor.
Whatever your techno is, you should increase the width of the...
Deep Nwell provides you with a mean to isolate NMOS bulk by placing a Pwell into it.
It could be very effective for noise issues, and also to improve linearity and thus THD of your amplifier when you're using an NMOS differential apir within your amplifier.
But you should be carefull using...
Hi,
I'm a pure analog designer, and I'm now facing my limits with digital issues. I have designed a complete 8 bit charge redistribution SAR ADC. I made up the sar (successive approximation register) by hand, i.e. by instanciating gates in schematic.
However, I'm looking for a smarter...
dnl, adc
INL and DNL are closely dependant, and usually depends on device's matching. They are static parameters
SNR, depends on noise issues, and is a dynamic parameter (so it has no relationship with INL or DNL).
simulink for adc-sar
You may model the DAC you're using in mathlab, and simply add mismatches in mathlab. That way, you will be able to know the linearity of your dac, which should be very close to that of your SAR ADC. Mathlab modelization will be far faster than spice one.
There are also...
Resistor mismatch is depends on a AR (%.um) parameter
σ(ΔR/R) = AR / SQR(W*L)
So, just as MOS transistors, you just have to increase area to improve matching. However, matching parameter AR is given for closely placed devices.
Thus 0.001% is not feasible on integrated resistors (maybe except...
Resistor mismatch is depends on a AR (%.um) parameter
σ(ΔR/R) = AR / SQR(W*L)
So, just as MOS transistors, you just have to increase area to improve matching. However, matching parameter AR is given for closely placed devices.
Thus 0.001% is not feasible on integrated resistors (maybe except...
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