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Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is a method for encoding analog signals into digital signals as found in an analog-to-digital converter (ADC). It is also used to convert high bit-count, low-frequency digital signals into lower bit-count, higher-frequency digital signals as part of the process to convert digital signals into analog as part of a digital-to-analog converter (DAC).
Vibration rectification error correction device, sensor module and method thereof
ActiveCN116182923BAcceleration measurement in multiple dimensionsSoftware engineeringDelta-sigma modulation
A vibration rectification error correction device, a sensor module, and a method thereof, in order to generate data synchronized with a signal that is not synchronized with a reference signal, do not require a large circuit size synchronization circuit or a heavy load operation. The vibration rectification error correction device includes a reference signal generation circuit that outputs a reference signal; a frequency delta sigma modulation circuit that frequency delta sigma modulates the reference signal using a measured signal to generate a frequency delta sigma modulation signal; a first filter that is provided at a subsequent stage of the frequency delta sigma modulation circuit and that operates in synchronization with the measured signal; and a second filter that is provided at a subsequent stage of the first filter and that operates in synchronization with a first frequency signal that is not synchronized with the reference signal.
Owner:SEIKO EPSON CORP