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Re: integrated buck converter layout
3. The metal routing and wirebond connections should be "balanced" - meaning that current should be distributed as uniformly as possible over the power array area. The current in the devices should be uniform over the array.
Max
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Hi, I...
Hi, all
There is a urgent question about the power pmos and nmos gate drive circuit.
The gate drive circuit is composed of invertor chain. PG and NG are the gate node of PMOS and NMOS respectively.
we know that for efficiency consieration this time interval should be in a range.
If the time is...
Hi all.
My BGR was fabed out recently. The spec output voltage is 1.2V . But the results show Vref distribution as gaussion from 1.0V to 1.4V. This BGR was fabed in a new process which combines with a cmos process and some 5V transsitors. This BGR's architecture was verified by other process and...
oscillator output frequency
Hello.
I am trying to design a buck dcdc convertor.
And a ring osc is needed. I wonder is it necessary aim to get a high accuracy osc output frequency. If the frequency varies with PVT seriously. what will happen?
Thanks in advance.
Is there any book analysis PWM...
vdrop=0.5V don;t mean vin-vout=0.5V. The output voltage depends on the application. vdrop means the lowest vdd(vin) that could regulate the whole loop to operate normally. for example, If vout = 1.2V, vdrop=0.5V, with this case the minmum vdd(vin)=1.7V. the vdd(vin) must be a voltage range not a...
I want to get to know is the parasitic resistor which is extracted in postnetlist include metal parasitic resistor?
what is this parasitic resistance depends on in GDS?
Thanks.
a strange question
different m have different source and drain area which reuslt in different parasitic capacitator.
m also affact Vth.
Generally we decide a unit width to get good matching.
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