公开(公告)号：EP1248371A1

公开(公告)日：2002-10-09

申请号：EP01830242.2

申请日：2001-04-06

Applicant: STMicroelectronics S.r.l.

Inventor： Clerici, Gian Carlo ,  Tomasini, Luciano

IPC: H03K19/0185 ,  H03F3/45

CPC classification number: H03K19/018528 ,  H03F3/45659 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45642 ,  H03F2203/45652 ,  H03F2203/45666 ,  H03F2203/45674 ,  H03F2203/45686

Abstract: The converter comprises a differential amplifier (DIF) having two differential input signals of a first level (V in+ , V in- ) and two differential outputs (V out+ , V out- ), and two output buffers each comprising an inverter (I1, I2) with an input connected to an output of the differential amplifier. In order to produce a symmetrical circuit with output signals having leading and trailing edges and duty-cycles identical to those of the input signals, the converter comprises means (Rv) with adjustable conductivity through which the current (Io) of the differential amplifier passes, and a feedback circuit comprising a generator (Iref) which generates a reference potential (Vref) and is formed by circuit components of shapes and dimensions correlated in predetermined manner with the shapes and dimensions of the components of the inverter (I1, I2). The feedback circuit is connected between a node (N) of the differential amplifier (DIF) which, in operation, is at an intermediate potential between the potentials of the differential outputs, and a regulation terminal of the means (Rv) with adjustable conductivity, in order to regulate the supply voltage of the differential amplifier in a manner such as to keep the potential of the node (N) which is at the intermediate potential at the reference potential which is also the "trigger" potential of the inverters.

Abstract translation: 差分电路（DIF）具有两个p沟道晶体管（M3'，M4'），其栅电极连接在节点（A，B）之间串联连接的两个相同电阻器（R）之间的连接节点（N） 而它们的源电极构成差分电路的电源端子。 反馈电路产生参考电位，并且在节点（N）和电阻器（Rv）之间连接比较器（CMP）以调节电源电压并将节点（N）维持在中间电位。