Latch with a feedback circuit

摘要

An apparatus may include a storage circuit that may have a first terminal and a second terminal and may have two cross-coupled inverters. The apparatus may include a feedback circuit coupled to the first terminal. The feedback circuit may include electronic logic elements to determine if the storage circuit is in a metastable state. The feedback circuit may couple at least one of the first and second terminals to one of a voltage reference and a voltage source if determined that the storage circuit is in a metastable state.

主权项

1. A latch circuit, comprising:
a storage circuit having a first terminal and a second terminal and including two cross-coupled inverters; an input data terminal coupled to the storage circuit; a control terminal coupled to the storage circuit; an output terminal and an output_bar terminal coupled to the storage circuit, wherein the output_bar terminal provides a logic level that is opposite a logic level of the output terminal; and a feedback circuit coupled to the storage circuit, the feedback circuit including electronic logic elements to determine if the storage circuit is in a metastable state based on logical levels of the control terminal, the input data terminal, and the output_bar terminal, the feedback circuit to couple at least one of the first and second terminals to one of a voltage reference and voltage source to resolve the storage circuit to a state different from the metastable state.