| 摘要 |
An n-bit digital/analog converter is provided for converting an n-bit digital word to a corresponding voltage. The converter comprises an (n-1) bit bufferless switched capacitor digital/analog converter ( 10 ) having an output (V<SUB>out</SUB>) for direct connection to a capacitive load (C<SUB>LOAD</SUB>). The (n-1) bit converter ( 10 ) also has first and second reference voltage inputs (V<SUB>1</SUB>, V<SUB>2</SUB>) and an (n-1) bit digital input. An (n-1) bit selective inverter ( 13 <SUB>1</SUB> , . . . , 13 <SUB>n-1</SUB> , 14 <SUB>1</SUB> , . . . , 14 <SUB>n-1</SUB>) supplies the (n-1) least significant bits to the digital input and inverts them if the most significant bit has a certain value. A switching arrangement ( 11, 12 ) connects the first and second reference voltage inputs (V<SUB>1</SUB>, V<SUB>2</SUB>) to receive first and second or second and first reference voltages depending on the value of the most significant bit.
|
