# US 10,483,847 B2 · Power converter calibration method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,847 B2 - Document ID: US10483847B2 - Status: Granted - Kind: B2 - Application number: 14/601,401 - Filed: 2015-01-21 - Published: 2015-06-11 - Granted: 2019-11-19 - Earliest claimed: 2010-03-09 - Assignees: Infineon Technologies Austria AG - Applicants: Infineon Technologies Austria AG - Inventors: Benjamim Tang; Chun-Yen Lin; Rohan Samsi; Jinghong Guo; Tim M. Ng; Richard C. Pierson - Web page: https://patentgrep.com/patent/US10483847B2 ## CPC - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - G01R 19/00: Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24) - G01R 35/005: {Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references (G01R33/0035, G01R35/002 take precedence)} - B23K 26/351: for trimming or tuning of electrical components - G01R 31/40: Testing power supplies (testing photovoltaic devices H02S50/10) - H02M 1/0009: {Devices or circuits for detecting current in a converter} - H02M 3/1584: {with a plurality of power processing stages connected in parallel} - H10D 89/105: {adapted for thermal considerations} - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract Methods and apparatus for a power regulator according to various aspects of the present invention may comprise a sensor adapted to generate a measurement of a voltage or a current. A memory may store a correction parameter that corresponds to the measurement, and a correction system may be adapted to adjust the measurement according to the correction parameter. ## Claims ### Claim 1 A power regulator, comprising: a sensor configured to generate a first measurement comprising at least one of a voltage measurement and a current measurement; a memory configured to store a correction parameter associated with the first measurement; a correction system configured to adjust the first measurement according to the correction parameter; a power stage; a controller configured to regulate an output of the power regulator according to the adjusted first measurement, wherein the controller comprises a PWM (pulse width modulation) circuit configured to provide, to the power stage, a duty cycle based upon the adjusted first measurement. ### Claim 2 (depends on 1) The power regulator of claim 1, further comprising a test interface configured to receive the correction parameter from a test system and to write the correction parameter to the memory. ### Claim 3 (depends on 2) The power regulator of claim 2, wherein the test interface is configured to allow the test system to control the output of the power regulator. ### Claim 4 (depends on 2) The power regulator of claim 2, wherein the test interface is configured to transmit the first measurement to the test system. ### Claim 5 (depends on 2) The power regulator of claim 2, wherein the controller is configured to operate in an operating mode which comprises: a normal mode; and a test mode. ### Claim 6 (depends on 5) The power regulator of claim 5, wherein the test interface is further configured to receive an operating mode signal from the test system and place the power regulator into a corresponding operating mode. ### Claim 7 (depends on 6) The power regulator of claim 6, wherein the correction parameter comprises a first correction parameter for a first operating mode and a second correction parameter for a second operating mode. ### Claim 8 (depends on 1) The power regulator of claim 1, wherein the sensor comprises a current sensor associated with an error, and wherein the correction parameter is adapted to compensate for the error. ### Claim 9 (depends on 1) The power regulator of claim 1, further comprising a voltage sensor associated with an error, wherein the correction parameter is adapted to compensate for the error. ### Claim 10 (depends on 1) The power regulator of claim 1, wherein the correction parameter comprises a voltage sense offset. ### Claim 11 (depends on 1) The power regulator of claim 1, wherein the correction parameter comprises a current sense offset and a gain adjustment for each mode of operation. ### Claim 12 (depends on 1) The power regulator of claim 1, wherein the correction parameter comprises an offset and a gain adjustment for the power stage and an additional offset and an additional gain adjustment for an additional power stage of the power regulator. ### Claim 13 (depends on 1) The power regulator of claim 1, wherein the correction parameter comprises a look up table comprising a plurality of non-linear corrections of a current sense transfer function. ### Claim 14 (depends on 1) The power regulator of claim 1, wherein the power regulator comprises a buck converter. ### Claim 15 (depends on 1) The power regulator of claim 1, wherein the power stage of the power regulator comprises a metal-oxide semiconductor field-effect transistor (MOSFET). ### Claim 16 (depends on 8) The power regulator of claim 8, further comprising an output inductor, wherein the current sensor is a direct-current resistance (DCR) sensor that uses a voltage across the output inductor to sense a current in the output inductor. ### Claim 17 (depends on 8) The power regulator of claim 8, wherein the power stage further comprises a transistor, and the current sensor uses a voltage across a drain and a source terminal of the transistor to measure a current in the transistor. ### Claim 18 (depends on 8) The power regulator of claim 8, wherein the power stage further comprises a transistor, and the current sensor comprises a current mirror of the transistor. ### Claim 19 (depends on 8) The power regulator of claim 8, further comprising a resistor coupled to an input, the output, or a ground return of the power regulator, and the current sensor uses a voltage across the resistor to determine the first measurement.