Optimal design of a CMOS op-amp via geometric programming

Optimal design of a CMOS op-amp via geometric programming (2001)

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by Maria Del Mar Hershenson , Stephen P. Boyd , Thomas H. Lee

Venue:	IEEE Transactions on Computer-Aided Design
Citations:	36 - 8 self

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Datum	Value	Source
TITLE	Optimal design of a CMOS op-amp via geometric programming	INFERENCE
AUTHOR NAME	Maria Del Mar Hershenson	SVM HeaderParse 0.2
AUTHOR AFFIL	Electrical Engineering Department; Stanford University	SVM HeaderParse 0.2
AUTHOR ADDR	Stanford CA 94305	SVM HeaderParse 0.2
AUTHOR NAME	Stephen P. Boyd	SVM HeaderParse 0.2
AUTHOR AFFIL	Electrical Engineering Department; Stanford University	SVM HeaderParse 0.2
AUTHOR ADDR	Stanford CA 94305	SVM HeaderParse 0.2
AUTHOR NAME	Thomas H. Lee	SVM HeaderParse 0.2
AUTHOR AFFIL	Electrical Engineering Department; Stanford University	SVM HeaderParse 0.2
AUTHOR ADDR	Stanford CA 94305	SVM HeaderParse 0.2
ABSTRACT	We describe a new method for determining component values and transistor dimensions for CMOS operational ampli ers (op-amps). We observe that a wide variety of design objectives and constraints have a special form, i.e., they are posynomial functions of the design variables. As a result the ampli er design problem can be expressed as a special form of optimization problem called geometric programming, for which very e cient global optimization methods have been developed. As a consequence we can e ciently determine globally optimal ampli er designs, or globally optimal trade-o s among competing performance measures such aspower, open-loop gain, and bandwidth. Our method therefore yields completely automated synthesis of (globally) optimal CMOS ampli ers, directly from speci cations. In this paper we apply this method to a speci c, widely used operational ampli er architecture, showing in detail how to formulate the design problem as a geometric program. We compute globally optimal trade-o curves relating performance measures such as power dissipation, unity-gain bandwidth, and open-loop gain. We show how the method can be used to synthesize robust designs, i.e., designs guaranteed to meet the speci cations for a	SVM HeaderParse 0.2
YEAR	2001	INFERENCE
VENUE	IEEE Transactions on Computer-Aided Design	INFERENCE
VENUE TYPE	JOURNAL	INFERENCE
PAGES	1--21	INFERENCE
VOLUME	20	INFERENCE
CITATIONS	86 found	ParsCit 1.0