Electrically trimmable resistor device and trimming method thereof

摘要

An integrated circuit has a circuit part and a trimmable resistor, the resistance whereof may be modified by Joule effect. The trimmable resistor has first and second connection terminals coupled to the circuit part, and an intermediate terminal that divides the trimmable resistor into two portions. The first and the second connection terminals and the intermediate terminal are coupled to respective pads configured to receive electrical quantities designed to cause, in use, a respective trimming current flow in each portion. In this way, a substantially zero voltage drop is maintained between the first and second connection terminals while current is flowing in the resistor to change an electrical characteristic of the resistor, such as resistance or thermal coefficient.

主权项

1. A circuit, comprising:
a circuit part; first and second connection pads; and a trimmable resistor trimmable by Joule effect, the trimmable resistor having:
first and second connection terminals electrically coupled to the circuit part, at least one of the first and second connection terminals being configured to be electrically coupled in a trimming phase to the first connection pad;an intermediate terminal electrically coupled to the second connection pad; andfirst and second resistor portions, the first resistor portion positioned between the first connection terminal and the intermediate terminal and the second resistor portion positioned between the second connection terminal and the intermediate terminal, the first and second connection pads being configured to receive a substantially zero voltage drop between the first and the second connection terminals and the intermediate terminal being configured to receive an electrical quantity able to generate in the first and second resistor portions respective trimming current flows that modify an electric characteristic of the trimmable resistor.