Abstract: A digital to analog converter (DAC) for converting a digital signal (DS) having a maximum voltage range which corresponds to a first supply voltage (UL) into an analog signal (Uout) having a maximum voltage range which corresponds to a second supply voltage (UH). The first supply voltage (UL) is offered between a first supply terminal (VSS) and a second supply terminal (VDDL). The second supply voltage (UH) is offered between the first supply terminal (VSS) and a third supply terminal (VDDH). The digital to analog converter (DAC) comprises conversion resistors (RCNV0-RCNVn) and coupling means (CPL) for coupling a number of said conversion resistors (RCNV2-RCNVn) in between the first supply terminal (VSS) and an output terminal (OUT), and for coupling the remainder of said conversion resistors (RCNV0-RCNV1) in between the third supply terminal (VDDH) and the output terminal (OUT). The value of said number depends on the data content of the digital signal (DS).

Abstract: Electronic circuitry comprising a data processing circuit for processing a digital signal (DS), such as a digital to analog converter (DAC), and a current compensation circuit (CMP). Both the digital to analog converter (DAC) and the current compensation circuit (CMP) are powered by a single power supply (U1). The current taken from the power supply (U1) by the digital to analog converter (DAC) is normally dependent on the digital input signal (DS). This would lead to distortion since the loss-resistances (R11, R12) which are always present in series with the power supply (U1) then feed a data-dependent supply voltage (U2) to the digital to analog converter (DAC). This problem is overcome by the addition of the current compensation circuit (CMP) which is coupled for receiving the digital signal (DS).

Abstract: A digital to analog converter (DAC) for converting a digital signal (DS) having a maximum voltage range which corresponds to a first supply voltage (UL) into an analog signal (UOUT) having a maximum voltage range which corresponds to a second supply voltage (UH). The first supply voltage (UL) is offered between a first supply terminal t(VSS) and a second supply terminal (VDDL). The second supply voltage (UH) is offered between the first supply terminal (VSS) and a third supply terminal (VDDH). The digital to analog converter (DAC) comprises conversion resistors (RCNV0-RCNVn) and coupling means (CPL) for coupling a number of said conversion resistors (RCNV2-RCNVn) in between the first supply terminal (VSS) and an output terminal (OUT), and for coupling the remainder of said conversion resistors (RCNV0-RCNV1) in between the third supply terminal (VDDH) and the output terminal (OUT). The value of said number depends on the data content of the digital signal (DS).

Abstract: Electronic circuitry comprising a data processing circuit for processing a digital signal (DS), such as a digital to analog converter (DAC), and a current compensation circuit (CMP). Both the digital to analog converter (DAC) and the current compensation circuit (CMP) are powered by a single power supply (U1). The current taken from the power supply (U1) by the digital to analog converter (DAC) is normally dependent on the digital input signal (DS). This would lead to distortion since the loss-resistances (R11, R12) which are always present in series with the power supply (U1) then feed a data-dependent supply voltage (U2) to the digital to analog converter (DAC). This problem is overcome by the addition of the current compensation circuit (CMP) which is coupled for receiving the digital signal (DS).