L11 lecture

L11 lecture - How do we get V oc ? Resistive divider...

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EECS 240 Lecture 11: Common-mode Feedback B. Boser 1 Common-Mode Feedback Problem – High gain (~ A dm ) from tail current source to V oc amplifies mismatch –V oc rails at either supply Solution – Feedback to regulate V oc to desired value V cmfb0 (usually ~ mid-supply) – Control point: tail or load current source(s)
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Unformatted text preview: How do we get V oc ? Resistive divider Amplifier Capacitive divider EECS 240 Lecture 11: Common-mode Feedback B. Boser 2 Dynamic CMFB Stability of CMFB loop Loop gain Settling accuracy, speed Simulation Transient AC...
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