SYSTEM AND METHOD FOR GENERATING CASCODE CURRENT SOURCE BIAS VOLTAGE

摘要

A circuit includes: a cascode current source comprising: a current mirror transistor; and a cascode transistor; and a bias circuit coupled to the cascode current source, the bias circuit comprising: a current source; a first transistor coupled in series to the current source to form a first current path through the current source and the first transistor; a second transistor coupled in series to the current source; and a third transistor coupled in series to the second transistor and the current source to form a second current path through the current source and the second and third transistors, wherein the third transistor has a channel size greater than a channel size of the second transistor by a multiple determined according to a design factor of the bias circuit.

主权项

1. A circuit comprising:
a cascode current source comprising:
a current mirror transistor; anda cascode transistor; and a bias circuit coupled to the cascode current source, the bias circuit comprising:
a current source;a first transistor coupled in series to the current source to form a first current path through the current source and the first transistor;a second transistor coupled in series to the current source; anda third transistor coupled in series to the second transistor and the current source to form a second current path through the current source and the second and third transistors, wherein the third transistor has a channel ratio greater than a channel ratio of the second transistor by a multiple determined according to a design factor of the bias circuit.