Digital-to-analog converter of the current-adding type

Details Digital-to-analog converter of the current-adding type Digital-to-analog converter of the current-adding type

H - Electricity

03

M

354/98

H03M 1/78 (2006.01) H03M 1/00 (2006.01)

Patent

CA 1212778

ABSTRACT OF THE DISCLOSURE A digital-to-analog converter of the current- adding kind includes n input buffer circuits to which the bits of the digital signal are applied in parallel, a first ladder resistor network having n resistors connected in series to which complementary outputs of the input buffer circuit are connected, a second ladder resistor network for dividing output terminal voltages from the first ladder resistor network into 2(2n-1) voltages, (2n-1) switching circuits having inputs connected to voltage dividing points of the second resistor network, and a common summing resistor connected to the outputs of the switching circuits to add currents supplied thereto, thereby providing an analog voltage having a level corresponding to the numerical value of the digital input signal.

424805

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