Abstract: A preamplifier amplifies signals input to first and second input terminals. A first switching circuit receives first and second input signals and outputs those to the first and second input terminals. A switched capacitor circuit samples two signals amplified by the preamplifier. Differential signals sampled by the switched capacitor circuit are respectively input to third and fourth input terminals of an integration circuit, and the integration circuit outputs differential signals obtained by those input signals to first and second output terminals. A second switching circuit switches a connection relationship between the switched capacitor circuit and the integration circuit. Each time the cycle changes, the first and second switching circuits switch the connection relationships to cause the signals amplified by the preamplifier to be sampled by double correlation sampling.

Abstract: A preamplifier amplifies signals input to first and second input terminals. A first switching circuit receives first and second input signals and respectively outputs those signals to the first and second input terminals. A switched capacitor circuit samples two signals amplified by the preamplifier. An integration circuit includes a fully differential operational amplifier outputting amplifying differential signals input between third and fourth input terminals between second and first output terminals, and first and second integration capacitors. A second switching circuit switches a connection relationship between the switched capacitor circuit, and the first and second integration capacitors. A third switching circuit switches a connection relationship between the first and second integration capacitors, and third and fourth output terminals.

Abstract: Errors in a cyclic analog to digital converter are reduced. An analog to digital converter is a cyclic analog to digital converter for converting an analog input signal into a digital output signal by performing a plurality of times of cycle processing on the analog input signal. A cycle processing unit performs the cycle processing and outputs a digital signal indicating a value of each bit of the digital output signal. An output circuit receives the digital signal output from the cycle processing unit and outputs, as an output signal, a signal obtained by inverting the digital signal every other cycle. A signal input to the cycle processing unit in second and subsequent cycles is generated in the cycle processing in a previous cycle. In the cycle processing, processing for inverting the signal input to the cycle processing is performed.

Abstract: There is provided a measuring device that suppresses flickering of display values displayed on a display and, at the same time, improves response of the measuring device. A measuring device includes a storage that stores information about the measuring device, control circuitry that calculates measurement results, and a display that displays the measurement results calculated by the control circuitry. The control circuitry determines whether or not filtering for suppression of a variation in display values Pn displayed on the display is to be executed and executes the filtering in response to the determination that the filtering is to be executed.

Abstract: Errors in a cyclic analog to digital converter are reduced. An analog to digital converter is a cyclic analog to digital converter for converting an analog input signal into a digital output signal by performing a plurality of times of cycle processing on the analog input signal. A cycle processing unit performs the cycle processing and outputs a digital signal indicating a value of each bit of the digital output signal. An output circuit receives the digital signal output from the cycle processing unit and outputs, as an output signal, a signal obtained by inverting the digital signal every other cycle. A signal input to the cycle processing unit in second and subsequent cycles is generated in the cycle processing in a previous cycle. In the cycle processing, processing for inverting the signal input to the cycle processing is performed.

Abstract: An analog-to-digital converter includes a cycle processing unit and a control unit. The cycle processing unit converts an analog input signal into a digital signal having a plurality of bits by performing a plurality of cycle processing on the analog input signal to acquire values of each bit in order from a higher-order bit to a lower-order bit. The control unit controls the cycle processing unit such that a period of the cycle processing is shortened according to a cycled number of the cycle processing.

Abstract: An analog-to-digital converter includes a cycle processing unit and a control unit. The cycle processing unit converts an analog input signal into a digital signal having a plurality of bits by performing a plurality of cycle processing on the analog input signal to acquire values of each bit in order from a higher-order bit to a lower-order bit. The control unit controls the cycle processing unit such that a period of the cycle processing is shortened according to a cycled number of the cycle processing.

Abstract: There is provided a measuring device that suppresses flickering of display values displayed on a display and, at the same time, improves response of the measuring device. A measuring device includes a storage that stores information about the measuring device, control circuitry that calculates measurement results, and a display that displays the measurement results calculated by the control circuitry. The control circuitry determines whether or not filtering for suppression of a variation in display values Pn displayed on the display is to be executed and executes the filtering in response to the determination that the filtering is to be executed.