18516954. IMPEDANCE MEASUREMENT CIRCUIT AND IMPEDANCE MEASUREMENT METHOD THEREOF simplified abstract (Taiwan Semiconductor Manufacturing Company, Ltd.)
IMPEDANCE MEASUREMENT CIRCUIT AND IMPEDANCE MEASUREMENT METHOD THEREOF
Organization Name
Taiwan Semiconductor Manufacturing Company, Ltd.
Inventor(s)
Chin-Ming Fu of Hsinchu County (TW)
Chih-Hsien Chang of New Taipei City (TW)
IMPEDANCE MEASUREMENT CIRCUIT AND IMPEDANCE MEASUREMENT METHOD THEREOF - A simplified explanation of the abstract
This abstract first appeared for US patent application 18516954 titled 'IMPEDANCE MEASUREMENT CIRCUIT AND IMPEDANCE MEASUREMENT METHOD THEREOF
Simplified Explanation
The impedance measurement circuit described in the patent application includes a current source, a voltage controlled oscillator (VCO), an operation circuit, and a first delay circuit. The current source sinks a current from the power rail based on a delayed clock signal, the VCO generates an oscillation signal based on the power voltage, the operation circuit senses the power voltage, generates a sampled signal, and accumulates the sampled signal to produce a measurement result, and the first delay circuit transmits the delayed clock signal to the current source.
- Current source sinks current from power rail based on delayed clock signal
- VCO generates oscillation signal based on power voltage
- Operation circuit senses power voltage, generates sampled signal, and accumulates for measurement result
- First delay circuit transmits delayed clock signal to current source
Potential Applications
- Impedance measurement in electronic circuits
- Battery testing and monitoring
- Sensor calibration
Problems Solved
- Accurate impedance measurement
- Real-time power voltage sensing
- Efficient current sinking from power rail
Benefits
- Precise impedance measurement
- Improved battery performance monitoring
- Enhanced sensor calibration accuracy
Original Abstract Submitted
An impedance measurement circuit and an operating method thereof are provided. The impedance measurement circuit includes a current source, a voltage controlled oscillator (VCO), an operation circuit, and a first delay circuit. The current source, electrically connected to a power rail, is able to sink a current from the power rail according to the delayed clock signal. The VCO is configured to generate an oscillation signal according to a power voltage on the power rail. The operation circuit is electrically connected to the VCO and is configured to receive a sampling clock signal and the oscillation signal, sense the power voltage to generate a sampled signal, and accumulate the sampled signal to generate a measurement result. The first delay circuit, electrically connected to the current source and the operation circuit, is able to receive the sampling clock signal and transmit the delayed clock signal to the current source.
