Semiconductor Rectifier with Timer Calibration for Reverse Current
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Solution Overview
Problem
Existing semiconductor devices face challenges in efficiently and stably converting high-frequency AC voltage to DC voltage in high-speed operating environments, particularly in wireless power transmission, and often experience inefficiencies due to reverse current generation.
Innovation Solution
A semiconductor device comprising a comparator, timer circuit, driver, calibration circuit, and protection circuit that compares voltages, controls transistor operations, and generates timer calibration and stop signals to optimize voltage conversion, preventing reverse currents and adjusting operation times for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a rectifier operates in a high-speed environment with high-frequency AC voltage, then the voltage conversion speed increases, but the efficiency and stability of the rectifier deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-calibrating the timer circuit operation time before actual rectification operation. The calibration circuit adjusts the timer circuit's operation time based on predetermined calibration values, ensuring optimal timing is established in advance. This preliminary calibration enables the rectifier to operate efficiently at high speeds without compromising stability during actual operation.
Solution Approach 2:
The patent implements feedback through the calibration circuit that monitors and adjusts the timer circuit operation time based on calibration signals. The feedback mechanism compares the actual rectifier performance with target parameters and automatically adjusts the timer operation time to maintain optimal efficiency and stability even in high-speed operating conditions.
2Device complexity
If the rectifier operates without precise timing control, then the device complexity is reduced, but reverse current is generated between rectified voltage and AC voltage
Solution Approach 1:
The patent uses preliminary action by pre-calibrating the timer circuit operation time before actual rectification operation. The calibration circuit adjusts the timer circuit's operation time based on predetermined calibration values, ensuring optimal timing is established in advance. This preliminary calibration enables the rectifier to operate efficiently at high speeds without compromising stability during actual operation.
Solution Approach 2:
The patent implements feedback through the calibration circuit that monitors and adjusts the timer circuit operation time based on calibration signals. The feedback mechanism compares the actual rectifier performance with target parameters and automatically adjusts the timer operation time to maintain optimal efficiency and stability even in high-speed operating conditions.
Data Source
AI summary
Provided are a semiconductor device and a method of operating the same. A semiconductor device may include a comparator which compares a first voltage with a rectified voltage and provides a second voltage in accordance with the comparison. A timer circuit may operate a timer according to the second voltage and output a third voltage in correspondence with an operation time of the timer. A driver may drive a transistor with a fourth voltage generated by the driver according to the third voltage. A calibration circuit may generate a timer calibration signal based on the second voltage and the fourth voltage. The timer calibration signal may be provided to the timer circuit and used to calibrate the operation time of the timer. More efficient rectification, with reduced occurrence of reverse current, may thereby be realized.