On-chip r and c calibration using on-board supply bypass capacitance
AssigneeBroadcom Corporation
InventorsMohyee MIKHEMAR, Hooman DARABI
Life of this patent
Estimating the term…
Abstract
A technique for calibration of on-chip resistance (R) and capacitance (C) values using an on-board bypass capacitor may include configuring an on-chip switch to selectively couple an on-chip calibration circuit to an on-chip port. The on-chip calibration circuit may include an RC oscillator having an RC time constant (RCTC). The on-board bypass capacitor may be coupled to the on-chip calibration circuit, by using the on-chip port. The on-chip R and C values may be calibrated using the on-chip calibration circuit and the on-board bypass capacitor.
Claims20
A device for calibration of on-chip resistance (R) and capacitance (C) values using an on-board bypass capacitor, the device comprising:
- an on-chip calibration circuit, including an RC oscillator having an RC time constant (RCTC), disposed to calibrate the on-chip R and C values;
- an on-chip switch configurable to selectively couple the on-chip calibration circuit to an on-chip port, the on-chip port being used for coupling the on-board bypass capacitor to the on-chip calibration circuit;
- and
- a calibration module configured to calibrate the on-chip R and C values using the on-chip calibration circuit and the on-board bypass capacitor.
A method for calibration of on-chip resistance (R) and capacitance (C) values using an on-board bypass capacitor, the method comprising:
- configuring an on-chip switch to selectively couple an on-chip calibration circuit to an on-chip port, the on-chip calibration circuit including an RC oscillator having an RC time constant (RCTC);
- coupling the on-board bypass capacitor to the on-chip calibration circuit, by using the on-chip port;
- and
- using the on-chip calibration circuit and the on-board bypass capacitor to calibrate the on-chip R and C values.
A system for calibration of on-chip resistance (R) and capacitance (C) values using an on-board bypass capacitor, the system comprising:
- an on-chip calibration circuit, including an RC oscillator having an RC time constant (RCTC), disposed to calibrate the on-chip R and C values;
- an on-chip switch configurable to selectively couple the on-chip calibration circuit to an on-chip port, the on-chip port being used for coupling the on-board bypass capacitor to the on-chip calibration circuit;
- an RCTC module configured to perform a first RCTC measurement while the switch is configured to uncouple the on-board bypass capacitor from the on-chip calibration circuit, and to perform a second RCTC measurement while the switch is configured to couple the on-board bypass capacitor to the on-chip calibration circuit;
- and
- a calibration module to determine a resistance Rcal and a capacitance Ccal of the on-chip calibration circuit by using a result of the first and the second RCTC measurements, and to calibrate the on-chip R and C values based on the determined resistance Rcal and capacitance Ccal of the on-chip calibration circuit.
Dependencies are inferred from the claim text.