Clock signal amplification circuit, control method thereof, and clock signal distribution circuit
AssigneeNEC Corporation
InventorYUSUKE MATSUSHIMA
Life of this patent
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Abstract
In an exemplary aspect of the invention, a clock signal amplifier circuit includes an amplifier circuit, a first switch part, and a second switch part. The amplifier circuit amplifies a clock signal. The first switch part controls ON/OFF of the amplifier circuit according to a select signal. The second switch part opens and closes complementarily to the first switch part according to the select signal. The amplifier circuit receives a test clock signal used in a test mode operation state through the second switch part. Further, the amplifier circuit outputs a signal generated by amplifying an input signal serving as the clock signal, or the test clock signal, according to the select signal.
Claims17
A clock signal amplifier circuit comprising:
- an amplifier circuit that amplifies a clock signal;
- a first switch part that controls ON/OFF of the amplifier circuit according to a select signal;
- and
- a second switch part that opens and closes complementarily to the first switch part according to the select signal,
- wherein the amplifier circuit receives a test clock signal used in a test mode operation state through the second switch part, and outputs a signal generated by amplifying the clock signal, or the test clock signal, according to the select signal.
A control method of a clock signal amplifier circuit comprising:
- supplying a clock signal to an amplifier circuit ON/OFF of which is controlled by a first switch part;
- supplying a test clock signal used in a test mode operation state to the amplifier circuit through a second switch part;
- opening or closing the first switch part and the second switch part complementarily by controlling the first and second switch parts according to a select signal;
- and,
- outputting, by the amplifier circuit, a signal generated by amplifying the clock signal, or the test clock signal.
Dependencies are inferred from the claim text.