公开(公告)号：EP1884785A1

公开(公告)日：2008-02-06

申请号：EP06425526.8

申请日：2006-07-25

Applicant: STMicroelectronics S.r.l.

Inventor： Carrara, Francesco ,  Presti, Calagero Davide ,  Scuderi, Antonio ,  Santagati, Carmelo ,  Palmisano, Giuseppe

IPC: G01R19/04 ,  G01R19/165

CPC classification number: G01R19/04 ,  G01R19/165

Abstract: A device for comparing the peak value of a periodic voltage signal or of a linear combination of periodic voltage signals (V 1 , V 2 , ..., V N ) with a reference voltage (V REF ) comprises:
- a reference transconductor element (Gm 0 ) for converting the reference voltage (V REF ) into a reference current (I REF ) ;
- respective transconductor elements (G m1 , G m2 , ..., G mN ) for converting each of the aforesaid periodic voltage signals (V 1 , V 2 , ..., V N ) into respective periodic current signals (i 1 , i 2 , ..., iN);
- a current-comparison node (100) for comparing the aforesaid respective periodic current signals (i 1 , i 2 , ..., iN) with the reference current (I REF ), generating a comparison current (i I ) as a difference between the sum of the aforesaid periodic current signals (i 1 , i 2 , ..., iN) and the reference current (I REF );
- a current rectifier (110) supplied with the comparison current (i I );
- a hold capacitor (C 0 ) charged with the output current (i 0 ) of the current rectifier (110); and
- a discharge-current generator (I DIS ) in parallel to said hold capacitor (C 0 ).
The voltage (V 0 ) across the capacitor indicates of the outcome of the comparison between the peak value of the aforesaid periodic voltage signal or the aforesaid linear combination of periodic voltage signals and the reference voltage (V REF ).

Abstract translation: 一种用于比较的周期性电压信号或与参考电压（V REF）周期电压信号（V 1，V 2，...，VN）的线性组合的峰值设备包括： - 参考跨导器元件（ GM 0）的基准电压（V REF）转换为基准电流（I REF）; - respectivement跨导器元件（G M1，G M2，...，G MN）为每个上述的周期电压信号（V 1，V 2，...，VN）的转换成respectivement周期性电流信号（I 1，I 2，...，IN）; - 用于比较上述respectivement周期性电流信号（I1，I2，...，IN）与基准电流（I REF），生成比较电流（i I）作为差值电流比较节点（100） 上述周期电流信号（I1，I2，...，IN）和参考电流（IREF）的总和之间; - 与比较电流（i I）供给的电流整流器（110）; - 充电电流整流器（110）的输出电流（i 0）的保持电容器（C 0）; 和 - 并联的放电电流发生器（I DIS）连接到所述保持电容器（C 0）。 的电压（V 0）跨电容器表示上述周期电压信号的峰值或周期电压信号的前述线性组合和参考电压（V REF）之间的比较的结果。