US 12,355,466 B2
Digital-to-analog converter
Shuichi Sakata, Tokyo (JP); Kento Saiki, Tokyo (JP); and Yuji Komatsuzaki, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Jul. 19, 2023, as Appl. No. 18/223,861.
Application 18/223,861 is a continuation of application No. PCT/JP2021/010469, filed on Mar. 16, 2021.
Prior Publication US 2023/0361783 A1, Nov. 9, 2023
Int. Cl. H03M 1/66 (2006.01); H03M 1/74 (2006.01)
CPC H03M 1/66 (2013.01) [H03M 1/745 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A digital-to-analog converter comprising: a plurality of 1-bit elements each of which outputs a current corresponding to a value indicated by a digital signal when the digital signal is input; and a capacitive load connected to the plurality of 1-bit elements, the digital-to-analog converter being configured to generate an analog voltage waveform via the capacitive load that receives currents output from the plurality of 1-bit elements, wherein
each of the 1-bit elements includes a switching circuit to change a bias of a voltage in each of the 1-bit elements according to a value indicated by an input digital signal, and to switch connection and non-connection with a power supply according to a change in the bias, and
the switching circuit includes:
a current supply switch transistor to switch connection and non-connection with the power supply;
a current discharge switch transistor to switch charge or discharge between each of the 1-bit elements and the capacitive load; and
a control switch transistor to switch the current supply switch transistor to a non-connection state by discharging the charge from each of the 1-bit elements and the capacitive load according to the value indicated by the input digital signal.