DIFFERENTIAL IDAC FOR PPG APPLICATIONS
개요
출원인
STMicroelectronics International N.V.
발명자
Ranieri Guerra; Angela Bruno
IPC 분류
CPC 분류
According to an embodiment, a differential current digital-to-analog converter (IDAC) proposed. The differential IDAC includes first and second reference resistors respectively coupled to a voltage supply rail and reference ground. A reference current source is positioned between the two reference resistors. The converter also features first and second variable resistors, both coupled to the voltage supply rail, with resistance values based on respective digital codes. Additionally, a p-channel transistor sources a first output current from the first variable resistor to a first output terminal, while an n-channel transistor sources a second output current from the second variable resistor to a second output terminal. The system includes amplifiers to ensure voltage equality across both pairs of reference and variable resistors, thereby stabilizing the output currents.
원문 (중국어)
According to an embodiment, a differential current digital-to-analog converter (IDAC) proposed. The differential IDAC includes first and second reference resistors respectively coupled to a voltage supply rail and reference ground. A reference current source is positioned between the two reference resistors. The converter also features first and second variable resistors, both coupled to the voltage supply rail, with resistance values based on respective digital codes. Additionally, a p-channel transistor sources a first output current from the first variable resistor to a first output terminal, while an n-channel transistor sources a second output current from the second variable resistor to a second output terminal. The system includes amplifiers to ensure voltage equality across both pairs of reference and variable resistors, thereby stabilizing the output currents.