Linear resistor with high resolution and bandwidth

摘要

Described is an apparatus which comprises: a first voltage follower; a second voltage follower; and a pass-gate including a p-type transistor in parallel to an n-type transistor, wherein gate terminal of the p-type transistor is controlled by an output of the first voltage follower, and wherein gate terminal of the n-type transistor is controlled by an output of the second voltage follower.

主权项

1. An apparatus comprising:
a first voltage follower coupled to sink current from a power supply node; a second voltage follower coupled to source current to a reference node; and a pass-gate including a p-type transistor in parallel with an n-type transistor, wherein a gate terminal of the p-type transistor is coupled to an output of the first voltage follower, and wherein a gate terminal of the n-type transistor is coupled to an output of the second voltage follower, wherein the first and second voltage followers each have corresponding first and second inputs respectively driven by the non-gate terminals of the pass-gate; a current mirror arrangement coupled to the outputs of the first and second voltage followers such that a first current sourced from an output of one of the voltage followers is in proportion to a second current sourced into an output of the other of the voltage followers.