公开(公告)号：US20130194021A1

公开(公告)日：2013-08-01

申请号：US13753390

申请日：2013-01-29

Applicant: STMicroelectronics S.r.I.

Inventor： Mauro Scandiuzzo ,  Salvatore Valerio Cani ,  Claudio Mucci ,  Roberto Canegallo ,  Pier Luigi Rolandi

IPC: H03K17/16

CPC classification number: H03K19/018507 ,  H03K17/16 ,  H03K19/018521 ,  Y10T29/49155

Abstract: An asynchronous level shifter electronic circuit including: a transmitter, which can be coupled to a first voltage and generates a communication signal; a receiver, which can be coupled to a second voltage; and a capacitive coupling stage, which receives the communication signal and supplies a corresponding filtered signal to the receiver. The receiver includes: a threshold device, which has an input terminal and an output terminal and switches an electrical quantity on the output terminal between a first value and a second value, as a function of corresponding transitions through a threshold of a first intermediate signal present on the input terminal, to generate a second intermediate signal; and a biasing circuit, which generates the first intermediate signal to have a d.c. component, which is a function of the second intermediate signal, and superposed on which is a variable component, which is a function of the filtered signal.