Capacitively coupled re-referencing circuit with transient correction
A re-referencing circuit for re-referencing a digital input signal from a first logic environment to a second logic environment includes a non-inverting circuit having a non-inverting transfer characteristic between the input and the output. A capacitive element has a first node coupled to the input of the non-inverting circuit and a second node arranged to receive the digital input signal. A resistive element is coupled between the input and the output of the non-inverting circuit. The re-referencing circuit further includes a transient correcting circuit having a first input coupled to a substantially DC level of the first logic environment, a second input coupled to a substantially DC level of the second logic environment, and an output coupled to the input of the non-inverting circuit. The transient correcting circuit applies transient DC differences between the two environments to cancel the effects of transients in the digital input signal.
Teradyne, Inc.
H H
H03K H03K
inventional inventional
Jiann-Neng
Chen