coxstreet
Junior Member level 3
Hi, I am using the classic folded cascode one stage OTA for the specification: gain=70dB, phase margin=60 degree and Unit gain frequency=90M Hz.
load capacitor =50p F
1. How to increase phase margin without decreasing gain, unit gain frequency and also without increasing load capacitor?
My simulation result: dc gain=70dB, Unit gain frequency=98M Hz, phase margin = 42 degree.
2. How to increase gain without decreasing unit-gain frequency?
My simulation result: dc gain=63dB, unit gain frequency=98M Hz, phase margin=60degree
3. How to increase -3dB frequency without inceasing load capacitor and also without decreasing gain and unit-gain frequency? Thanks!
COX
load capacitor =50p F
1. How to increase phase margin without decreasing gain, unit gain frequency and also without increasing load capacitor?
My simulation result: dc gain=70dB, Unit gain frequency=98M Hz, phase margin = 42 degree.
2. How to increase gain without decreasing unit-gain frequency?
My simulation result: dc gain=63dB, unit gain frequency=98M Hz, phase margin=60degree
3. How to increase -3dB frequency without inceasing load capacitor and also without decreasing gain and unit-gain frequency? Thanks!
COX
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