초록 ▼

A circuit (10) for reading a voltage at a voltage source (14) of an integrated circuit (12). In one version, the circuit (110) involves a pass circuit (118) that has an input coupled to the node (114) of the integrated circuit (12). The circuit (110) provides a measurement of the voltage at the node

A circuit (10) for reading a voltage at a voltage source (14) of an integrated circuit (12). In one version, the circuit (110) involves a pass circuit (118) that has an input coupled to the node (114) of the integrated circuit (12). The circuit (110) provides a measurement of the voltage at the node (114) as an output to a pin (116). A reset circuit (122) is coupled to the pass circuit (118) and is operable to activate and reset the pass circuit (118). Finally, a pass control circuit (120) is coupled to provide an output signal to the pass circuit (118) that drives the pass circuit (118) when active to pass the voltage at the node (114) to the pin (116).

대표청구항 ▼

[ What is claimed is:] [1.] A circuit for reading a voltage at a node of an integrated circuit, the circuit comprising:a pass circuit coupled between the node of the integrated circuit and a pin of the integrated circuit;a reset circuit coupled to the pass circuit and operable to activate and reset

[ What is claimed is:] [1.] A circuit for reading a voltage at a node of an integrated circuit, the circuit comprising:a pass circuit coupled between the node of the integrated circuit and a pin of the integrated circuit;a reset circuit coupled to the pass circuit and operable to activate and reset the pass circuit;a pass control circuit coupled to the pass circuit that provides at least one output signal to selectively drive the pass circuit to pass a voltage from the node to the pin of the integrated circuit so as to allow the voltage at the node to be read even after the integrated circuit is packaged; andwherein the pass circuit comprises:a pass gate having first, second and third terminals, the first terminal coupled to the control circuit, the second terminal coupled to the node of the integrated circuit, and the third terminal coupled to the pin; anda capacitor coupled between the first terminal of the pass gate and the pass control circuit such that the control signal from the pass control circuit drives the voltage at the first terminal of the pass gate to cause a voltage at the second terminal to be passed to the third terminal so as to read the voltage at the node of the integrated circuit.