# US 2026/0100696 A1 · Adaptive slope compensation in solenoid drivers to avoid instability in current regulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0100696 A1 - Document ID: US20260100696A1 - Status: Published application - Kind: A1 - Application number: 19/405,704 - Filed: 2025-12-02 - Published: 2026-04-09 - Earliest claimed: 2023-08-31 - Assignees: Texas Instruments Incorporated - Applicants: Texas Instruments Incorporated - Inventors: Sreenath Puthumana; Ganapathi Shankar; Venkata Naresh Kotikelapudi - Web page: https://patentgrep.com/patent/US20260100696A1 ## CPC - H03K 3/017: Adjustment of width or dutycycle of pulses (pulse width modulation H03K7/08 {; to maintain energy constant H03K3/015}) - H01F 7/064: {Circuit arrangements for actuating electromagnets (circuit arrangements for obtaining special operating characteristics H01F7/18; driving circuits for electromagnets making use of a switching regulator H01H47/325)} - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A circuit includes an amplifier having a first input, a reference input, and an output. A pulse width modulator (PWM) controller has an input coupled to the output of the amplifier. A first switch has a control terminal coupled to an output of the PWM controller. A second switch has a second terminal coupled to the second terminal of the first switch, and has a control terminal coupled to the output of the PWM controller. An input of a current sensor is coupled to the second terminal of the first switch and is coupled to a second terminal of the second switch. An output of the current sensor is coupled to the first input of the amplifier. A duty cycle monitoring and reference signal adjustment circuit has an input coupled to the output of the PWM controller and has an output coupled to the reference input of the amplifier. ## Claims ### Claim 1 A method, comprising: providing a first reference signal having a first slope for a first pulse-width modulated (PWM) clock cycle of a PWM signal, the first PWM clock cycle having a first duty cycle; providing the first reference signal with the first slope for a second PWM clock cycle of the PWM signal, the second PWM clock cycle having a second duty cycle; detecting a difference between the first duty cycle and the second duty cycle; and providing a second reference signal having a second slope responsive to the difference between the first duty cycle and the second duty cycle. ### Claim 2 (depends on 1) The method of claim 1, wherein the second duty cycle is greater than the first duty cycle, and the second slope is greater than the first slope. ### Claim 3 (depends on 2) The method of claim 2, further including: detecting a difference between the second duty cycle and a subsequent duty cycle; comparing the difference between the second duty cycle and the subsequent duty cycle to a reference duty cycle difference; and providing a subsequent reference signal having the first slope in response to the difference between the second duty cycle and the subsequent duty cycle being less than the reference duty cycle difference. ### Claim 4 (depends on 2) The method of claim 2, wherein the second reference signal having the second slope is provided for a third PWM clock cycle of the PWM signal, the third PWM clock cycle having a third duty cycle, and further including: detecting a difference between the second duty cycle and the third duty cycle; providing a third reference signal having the second slope and an initial reference magnitude that is greater than an initial reference magnitude of the second reference signal for the third PWM clock cycle. ### Claim 5 (depends on 1) The method of claim 1, wherein the first reference signal has a first initial magnitude and the second reference signal has a second initial magnitude equal to the first initial magnitude. ### Claim 6 The method of claim, further including: detecting a difference between the second duty cycle and a subsequent duty cycle; comparing the difference between the second duty cycle and the subsequent duty cycle to a reference duty cycle difference; and providing a subsequent reference signal having the first slope in response to the difference between the second duty cycle and the subsequent duty cycle being less than the reference duty cycle difference. ### Claim 7 (depends on 1) The method of claim 1, wherein the second reference signal having the second slope is provided for a third PWM clock cycle of the PWM signal, the third PWM clock cycle having a third duty cycle, and further including: detecting a difference between the second duty cycle and the third duty cycle; providing a third reference signal having the second slope and an initial reference magnitude that is greater than an initial reference magnitude of the second reference signal for the third PWM clock cycle.