DEM circuit, delta-sigma modulator, D/A converter, and wireless communication device

A dynamic element matching (DEM) circuit comprising:

• a switch;
• and
• a switch control signal generation circuit, wherein
• the switch receives an N-bit digital input signal and shifts bit positions of the digital input signal in a circulating pattern based on a switch control signal to obtain a shifted signal, and output the shifted signal as an N-bit digital output signal, where N is an integer greater than or equal to 2,
• the switch control signal generation circuit includes a plurality of pointers,
• the bit positions of the digital input signal in the digital output signal are determined by the pointers,
• the pointers move, based on a predetermined rule, in an identical direction which is any one of a direction toward higher bit orders or a direction toward lower bit orders, and
• the switch control signal generation circuit generates the switch control signal, each time when the digital input signal is input to the switch, by using the pointers in a predetermined order.