Ningbo Joyson Electronic has been granted a patent for a programmable resistance circuit that configures selected resistances using a reference resistor. The circuit utilizes a modulated voltage source to control a transistor, enabling variable output voltages based on user selections in vehicle interfaces. GlobalData’s report on Ningbo Joyson Electronic gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Ningbo Joyson Electronic, was a key innovation area identified from patents. Ningbo Joyson Electronic's grant share as of June 2024 was 63%. Grant share is based on the ratio of number of grants to total number of patents.
Programmable resistance circuit for adjustable output voltages
The patent US12047091B2 describes a programmable resistance circuit designed to configure multiple output voltages using a reference resistor. The circuit features a transistor connected to the reference resistor and an analog return line, with a modulated voltage source that biases the transistor between two states. In the first state, the transistor allows forward current flow, effectively turning the reference resistor "on," while in the second state, it exhibits high impedance, simulating the resistor being "off." This operation enables the establishment of an average output voltage that corresponds to the average resistance value of the reference resistor. The circuit is further designed to connect to a remote ground of external electronic circuit modules, isolating it from the local ground.
Additionally, the system incorporates a microcontroller that adjusts the duty cycle of the modulated voltage source based on user inputs from a vehicle's button selection zones. This adjustment influences the average output voltage and resistance value, which are critical for processing switch data in a vehicle's electronic control module. The circuit can utilize pulse width modulation (PWM) to set various duty cycles, allowing for distinct function selections. The design also includes a filter to isolate local and remote grounds, ensuring stable operation. Overall, the programmable resistance circuit and its integration into a computerized system enhance the functionality and responsiveness of vehicle control interfaces.
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