US 10,761,130 B1 · 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.

Claims14

Dependent claims

A method for operating a voltage driver comprising a plurality of circuit slices each configured to switchably connect a slice output to a first supply voltage or a second supply voltage, the method comprises:

for a circuit slice of the plurality of circuit slices,
measuring a first set of I-V values, each I-V value in the first set representing an output current at the slice output of the circuit slice versus a voltage difference between the slice output and the first supply voltage;
performing a fit of the first set of I-V values to obtain a first set of I-V parameters;
generating a lookup table indicating a plurality of combinations of a number of circuit slices to be connected to the first supply voltage versus an output voltage of the voltage driver based at least in part on the first set of I-V parameters.

1 more element

Dependencies are inferred from the claim text.

Voltage driver circuit calibration

Life of this patent

Voltage driver circuit calibration

Life of this patent

Abstract

Claims14