Configurable clock interface device

摘要

A configurable clock circuit on an integrated circuit, such as an integrated circuit memory, can be configured to utilize external multiple phase clocks and external single phase clocks to produce an internal clock signal in a form compatible with the integrated circuit.

主权项

1. A device, comprising:
an integrated circuit having input terminals; internal circuitry; a clock circuit on the integrated circuit to provide an internal clock signal to the internal circuitry, the clock circuit having clock inputs electrically connected to a plurality of the input terminals; the clock circuit configurable to produce the internal clock signal using different sets of the plurality of the input terminals in response to a configuration parameter; and a clock configuration store which provides the configuration parameter, wherein the clock circuit includes a first sub-circuit configured to produce a first clock signal using a single one of the plurality of input terminals, and a second sub-circuit configured to produce a second clock signal using the single one and another one of the plurality of input terminals, the first sub-circuit and the second sub-circuit commonly including an amplifier directly connected to the single one of the plurality of input terminals.