RESISTIVE LADDER

摘要

A resistive ladder has first, second and third resistors coupled in series between first and second voltage terminals. A first node of the first resistor is coupled to the first voltage terminal and a first node of the third resistor is coupled to the second voltage terminal. A voltage selection unit has a first input coupled to a first node of the second resistor and a second input coupled to a second node of the second resistor and is adapted to selectively couple one of the first and second inputs to an output node of said resistive ladder. The resistive ladder also includes a first switch coupled between a second node of the third resistor and the second voltage terminal.

主权项

1. A resistive ladder comprising:
first, second and third resistors coupled in series between first and second voltage terminals, a first node of said first resistor being coupled to said first voltage terminal and a first node of said third resistor being coupled to said second voltage terminal; a voltage selection unit having a first input coupled to a first node of said second resistor and a second input coupled to a second node of said second resistor, wherein said voltage selection unit is configured to selectively couple one of said first and second inputs to an output node of said resistive ladder; and a first switch coupled between a second node of said third resistor and said second voltage terminal.