Patent ID: 11967816
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A circuit operable to operate in an analog mode, a first digital mode and a second digital mode, the circuit comprising:
an I/O connection adapted to be coupled to an external resistance having an external resistance;
a resistance-to-current (R/I) converter coupled to the I/O connection, the R/I converter comprising:
an error amplifier having a first input adapted to be coupled to a first reference voltage, a second input coupled to the I/O connection, and an output; and
a current mirror coupled to the output of the error amplifier and having an output operable to indicate operation in the analog mode;

a first comparator having a first input coupled to the I/O connection, a second input adapted to be coupled to a second reference voltage and an output operable to indicate operation in the first digital mode; and
a second comparator having a first input coupled to the I/O connection, a second input adapted to be coupled to a third reference voltage and an output operable to indicate operation in the second digital mode.