Patent ID: 9054722
Filing Date: 2015-06-09
Classification: H03M

Abstract:
1. A method of calibrating switching circuitry, the switching circuitry comprising a measurement node and a plurality of output switches connected to the measurement node, and the circuitry being configured, in each clock cycle of a series of clock cycles, to control whether or not one or more of said output switches carry a given current based upon input data, the method comprising: inputting a plurality of different data sequences to the circuitry, each sequence causing a given pattern of voltages to occur at the measurement node as a result of currents passing through the output switches; measuring the voltages occurring at the measurement node for each said sequence; and calibrating the switching circuitry in dependence upon a result of said measuring, wherein each said output switch is associated with a corresponding clock cycle in a repeating set of clock cycles, and wherein the circuitry is configured in each clock cycle to control whether or not the associated switch carries a given current based upon input data.