Current amplifying apparatus

Details Current amplifying apparatus Current amplifying apparatus

H - Electricity

03

F

328/202, 330/26,

H03F 3/345 (2006.01) G05F 3/26 (2006.01) H03F 3/30 (2006.01)

Patent

CA 1205878

-12- ABSTRACT IMPROVEMENTS IN OR RELATING TO CURRENT AMPLIFYING APPARATUS. Two gate-coupled pairs (12,14; 16,18) of MOS transistors are configured in a compound current mirror (10,30) arrangement. Each pair includes an input (12,16) and an output (14,18) transistor. The output transistors are connected with their conduction paths in series between a current source and a reference voltage node (22). Each of the input transistors is connected with its conduction path between the reference voltage node (22) and a separate current source (20,24), with both sources supplying the same input current. One of the input transistors (12) has a conduction path width-to-length ratio one-fourth that of the other one (16). This makes it possible to bias the output transistors with the minimum ON voltage for operation in the active region and thereby reduces power supply voltage overhead.

453141

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