Low Voltage Circuit Design
In Chapter 3 the core problem of low voltage Switched Capacitor circuits is tackled: it is the switch driving problem. At that point, in Section 220.127.116.11, abstraction is made of the feasibility of operating amplifiers at low voltage. This chapter shows how to achieve low voltage operation on the circuit level. The design techniques are demonstrated with the two OTAs that are used in the realizations of Section 6.1 and Section 6.2. The first structure is a two stage Miller OTA and the second one is a new low voltage class AB OTA especially designed for Differential Switched Opamp applications. Further, other low voltage design techniques are demonstrated for the required building blocks in ∆Σ modulators.
KeywordsNoise Current Current Mirror Input Stage Dominant Pole Input Transistor
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