Capacitance evaluation apparatuses and methods

摘要

Apparatus and methods for evaluating leakage currents of capacitances are described. Capacitances having excessive leakage currents may be disabled from use. An example apparatus includes a leakage detection circuit configured to be coupled to a capacitance block. The leakage detection circuit is configured to determine whether a leakage current of a capacitance of the capacitance block exceeds a current limit and is further configured to provide an output indicative of a status of the capacitance. A detection controller is coupled to the leakage detection circuit and a register, and the detection controller is configured to store data in the register indicative of the status of the capacitance based at least in part on the signal from the leakage detection circuit.

主权项

1. An apparatus, comprising:
a leakage detection circuit configured to be coupled to a capacitance block, the leakage detection circuit configured to determine whether a leakage current of a capacitance of the capacitance block exceeds a reference current and further configured to provide an output indicative of a status of the capacitance, the leakage detection circuit including an output circuit having an input node and an output node, the output circuit configured to receive both the leakage and reference currents at the same input node, and based at least in part on the leakage and reference currents provide the output from the output node having a logic level indicative of whether the leakage current exceeds the reference current; a register; and a controller coupled to the leakage detection circuit and the register, the controller configured to store data in the register indicative of the status of the capacitance based at least in part on the output from the leakage detection circuit.