System and method of reducing magnitudes of kick-back voltages in a circuit that alternates a direction of current flow through a load

摘要

A circuit is provided and includes current sources, switches, a control module, and capacitances. The current sources adjust current flowing through a load. Each of the switches activates a respective one of the current sources. Kick-back voltages are generated at inputs of the current sources in response to the current sources being turned ON. A control module generates control signals to change states of the switches to alternate a direction in which the current flows through the load. A first capacitance is connected between a first pair of the current sources and a second pair of the current sources. A second capacitance is connected between the first pair of the current sources and a reference terminal. A third capacitance connected between the second pair of the current sources and the reference terminal. The first capacitance, the second capacitance, and the third capacitance reduce magnitudes of the kick-back voltages.

主权项

1. A circuit comprising:
a plurality of current sources configured to adjust current flowing through a load; a plurality of switches, wherein each of the plurality of switches is configured to activate a respective one of the plurality of current sources, and wherein kick-back voltages are generated at inputs of the plurality of current sources in response to the plurality of current sources being turned ON; a control module configured to generate control signals to change states of the plurality of switches to alternate a direction in which the current flows through the load; a first capacitance connected between (i) a first pair of the plurality of current sources and (ii) a second pair of the plurality of current sources; a second capacitance connected between (i) the first pair of the plurality of current sources and (ii) a ground reference terminal; and a third capacitance connected between (i) the second pair of the plurality of current sources and (ii) the ground reference terminal, wherein the first capacitance, the second capacitance, and the third capacitance reduce magnitudes of the kick-back voltages.