Schneller Digitaler Isolator

Details

Veröffentlichungs-Nr.

EP3846345

Aktenzeichen

EP19220251

Anmeldetag

31. Dezember 2019

Veröffentlichung

3. August 2022

Erteilung

3. August 2022

Rechtsraum

EP

IPC

H03K19/0175H04L25/02

Abstract

The invention relates to a digital isolator comprising a logic module (20) for receiving an input signal D, and providing command signals (41, 42) to sawtooth modulators. A first sawtooth modulator provides a first sawtooth signal at a node A1 comprising a fast rising edge triggered by a rising edge of a control signal, followed by a slow falling edge, when D equals 1 and comprises a fast falling edge triggered by a rising edge of a control signal, followed by a slow rising edge, when D equals 0. A second sawtooth modulator provides a second sawtooth signal at node A2, inverted with respect to first sawtooth signal. Isolation capacitors (61, 62) are connected to nodes A1 and A2 and are used as isolation barrier and as part of a high-pass filter together with dipoles Z1 and Z2. Threshold comparators (121, 122) provide the output signals S and R. Based on these S and R output signals, the input signal D referred to ground G1 can be regenerated versus a ground G2 using for example SR logic gate, low pass filters or peak detectors.

Anmelder

Firma

Vddtech

Land

🇧🇪 Belgien

Fachgebiete