PROJECT TITLE :
A Sub-1-V Bulk-Driven Opamp With an Effective Transconductance-Stabilizing Technique
The effective transconductance of a bulk-driven operational amplifier (opamp) will significantly vary with the input common-mode voltage. This variation of complicates frequency compensation and creates harmonic distortion. Thus, this temporary presents a -stabilizing technique to cut back the variation of across the input common-mode vary (ICMR). The plan is to use a variable positive feedback structure to adaptively management to the input common-mode voltage. A coffee-voltage bulk-driven opamp with the proposed -stabilizing technique has been implemented in an exceedingly zero.18- n-well CMOS process. The opamp consumes 261 from a 90zero-mV offer voltage. The variation of is reduced from 132% to twenty five% across the rail-to-rail ICMR. The measured dc gain is 76.8 dB and also the unity-gain bandwidth is 7.eleven MHz when the opamp is loaded with .
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