Teradyne, Inc.
Voltage driver circuit calibration

Abstract:

Disclosed herein are voltage driver circuits and methods of operating the same. In some embodiments, a plurality of circuit slices are provided in a voltage driver circuit, each circuit slice is controlled to switchably connect a driver output to either a high voltage level or a low voltage level via a resistor, or to disconnect the driver output from both voltage levels. The circuit slices may provide an adjustable output impedance, which may be set to match the impedance of different loads. The circuit slices may also provide adjustable voltages with low power consumption, particularly in high speed applications. A calibration procedure is disclosed herein to generate a lookup table for how to selectively connect circuit slices to supply voltages given a target output voltage.