CMOS analog standard cell arrays using linear transconductance e

Details CMOS analog standard cell arrays using linear transconductance e CMOS analog standard cell arrays using linear transconductance e

1986-08-19

1988-07-26

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330277, 330278, 330307, 357 42, 357 45, H03F 326

Patent

active

047603496

ABSTRACT:
A simple four-transistor CMOS linear, tunable, high-frequency transconductance element is applied to the design of analog standard cell arrays for semi-custom design of analog circuits. By substituting a pair of composited n-channel/p-channel devices for each transistor in a CMOS inverter circuit, the transconductance circuit achieves its linearity by current differencing without undue matching requirements. The linearity and frequency response is optimized by appropriate choice of device dimensions. The transconductance element is used as an elementary building block which forms the basis of a standard cell library for use in semi-custom analog circuit applications. Various analog circuits are realized by interconnecting a number of the transconductance elements in order to achieve a highly systematic design in chip layout along with high functional density.

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