Abstract:
A self-calibration circuit and method for capacitors are provided. A capacitor array is calibrated to approximate a reference capacitor according to an average parameter generated by calibrating the capacitor array multiple times. Since the capacitance of the compensation capacitor required to be connected to the target capacitor in parallel is determined according to the average parameter generated by performing the calibration multiple times, the error caused by a single calibration can be reduced, and meanwhile the calibration error caused by a reference voltage error or noise is reduced.
Abstract:
A self-calibration circuit and method for capacitors are provided. A capacitor array is calibrated to approximate a reference capacitor according to an average parameter generated by calibrating the capacitor array multiple times. Since the capacitance of the compensation capacitor required to be connected to the target capacitor in parallel is determined according to the average parameter generated by performing the calibration multiple times, the error caused by a single calibration can be reduced, and meanwhile the calibration error caused by a reference voltage error or noise is reduced.
Abstract:
A rational number frequency multiplier circuit and a method for generating rational number multiple frequency are disclosed. The circuit receives a plurality of input signals having the same frequency and different phase, and outputs at least one multiple frequency signal. The rational number frequency multiplier circuit includes a frequency divider module, for receiving and dividing the input signals to output frequency-divided signals having the same frequency and different phase; a first phase synthesis module and a second phase synthesis module for receiving and synthesizing the frequency-divided and input signals respectively into a plurality of first pulse period signals and second pulse period signals; and an adder for receiving and combining the first pulse period signals and the second pulse period signals into the multiple frequency signal according to the desired multiplication of the frequency.
Abstract:
A voltage regulator includes a comparator, a first voltage output unit, a second voltage output unit, a third voltage output unit, a first switch and a second switch. The voltage regulator receives an operating voltage and a reference voltage generated by a reference voltage generator, and then outputs a corresponding output voltage. The voltage regulator of the present invention can provide an operation mode, a suspend mode and a standby mode and can be switched among these modes to provide corresponding current driving capacity for respective operation states. When in the operation mode, the voltage regulator can supply a great current. When in the suspend mode, the voltage regulator consumes less power. When in the standby mode, the voltage regulator consumes even less power.
Abstract:
An electronic device for determining a type of a memory includes a comparator and a reset controller. The comparator for generating a discrimination signal according to a reference voltage and a first voltage of the memory, includes a first input end for receiving the first voltage, a second input end for receiving the reference voltage, a logic circuit coupled to the first input end and the second input end, for comparing the first voltage and the reference voltage so as to generate the discrimination signal, and an output end coupled to the logic circuit, for outputting the discrimination signal. The reset controller is used for determining the type of the memory according to the discrimination signal.
Abstract:
A voltage regulator includes a comparator, a first voltage output unit, a second voltage output unit, a third voltage output unit, a first switch and a second switch. The voltage regulator receives an operating voltage and a reference voltage generated by a reference voltage generator, and then outputs a corresponding output voltage. The voltage regulator of the present invention can provide an operation mode, a suspend mode and a standby mode and can be switched among these modes to provide corresponding current driving capacity for respective operation states. When in the operation mode, the voltage regulator can supply a great current. When in the suspend mode, the voltage regulator consumes less power. When in the standby mode, the voltage regulator consumes even less power.
Abstract:
A rational number frequency multiplier circuit and a method for generating rational number multiple frequency are disclosed. The circuit receives a plurality of input signals having the same frequency and different phase, and outputs at least one multiple frequency signal. The rational number frequency multiplier circuit includes a frequency divider module, for receiving and dividing the input signals to output frequency-divided signals having the same frequency and different phase; a first phase synthesis module and a second phase synthesis module for receiving and synthesizing the frequency-divided and input signals respectively into a plurality of first pulse period signals and second pulse period signals; and an adder for receiving and combining the first pulse period signals and the second pulse period signals into the multiple frequency signal according to the desired multiplication of the frequency.