Design of a minimum power, low-voltage supply fully-di erential

hyseresis

Design of a minimum power, low-voltage supply fully-differential
transconductance amplier for A/D converters
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0 h" s  h" l. j, |0 `$ j& B3 B' O) kBerkeley大學的,有電路圖W/L值,模擬圖,手算公式很詳盡
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Abstract_Two designs of a fully dierential
- n3 i) e3 C! ~* U  D& Ptransconductance amplier to be used in a rst stage
; J: ?5 e2 r  @of a pipelined 13-Bit A/D converter are developed
% X' Q0 U6 [' z" @- dand presented. A three stage amplier achieves the
lowest power design. The dynamic range specication
is met according to the expression for noise power
indicated in the design specication sheet. In this
report, anyway, we show that such expression is in-
correct for a Miller compensated topology. A sec-
/ M( O# g9 |) b' Z& g0 j2 Y5 \: ~+ Rond design is developed to meet the specications ac-
, \( b  j% s" g& U( h& v* ncording to a more accurate expression of the noise
power. Much higher power consumption is obtained
even from an optimized design. Miller compensation
1 a- Y, _- Z4 n/ @techniques are inferred to be inadequate to address
low-noise low-power specications.