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US 7,679,457 B2Granted
Oscillating apparatus
AssigneeAdvantest Corporation
InventorsHiroyuki Satoh, Haruki Nagami
Life of this patent
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Abstract
Provided is an oscillating apparatus that includes a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another; and a selection section that selects an oscillating signal that is from a variable frequency oscillator provided in correspondence with a designated oscillating band, from among the plurality of variable frequency oscillators, and outputs the selected oscillating signal, where the selection section includes a plurality of selectors connected in a tree structure, each selector outputting a selected one of inputted two or more oscillating signals, and each of the plurality of variable frequency oscillators is connected to a selector positioned at an end of the tree structure of the plurality of selectors.
Claims17
An oscillating apparatus comprising:
- a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another;
- and
- a selection section that selects an oscillating signal that is from a variable frequency oscillator provided in correspondence with a designated oscillating band, from among the plurality of variable frequency oscillators, and outputs the selected oscillating signal,
- wherein the selection section includes a plurality of selectors connected in a tree structure, each selector outputting a selected one of inputted two or more oscillating signals,
- each of the plurality of variable frequency oscillators is connected to a selector positioned at an end of the tree structure of the plurality of selectors, and
- a number of selectors through which an oscillating signal outputted from one of the variable frequency oscillators passes until being outputted from the oscillating apparatus is smaller than a number of selectors through which an oscillating signal outputted from at least one of the other variable frequency oscillators provided in correspondence with an oscillating band of a frequency lower than a frequency of the one variable frequency oscillator passes until being outputted from the oscillating apparatus.
3 more elements
An oscillating apparatus comprising:
- a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another and outputs a differential oscillating signal;
- a selection section that selects an oscillating signal that is from a variable frequency oscillator provided in correspondence with a designated oscillating band, from among the plurality of variable frequency oscillators, and outputs the selected oscillating signal;
- and
- an offset circuit that supplies an offset voltage between a positive-side input end and a negative-side input end of a selector receiving an oscillating signal, on condition that the oscillating signal inputted to the selector is stopped,
- wherein the selection section includes a plurality of selectors connected in a tree structure, each selector outputting a selected one of inputted two or more oscillating signals, and
- each of the plurality of variable frequency oscillators is connected to a selector positioned at an end of the tree structure of the plurality of selectors.
3 more elements
An oscillating apparatus comprising:
- a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another;
- and
- a selection section that selects an oscillating signal that is from a variable frequency oscillator provided in correspondence with a designated oscillating band, from among the plurality of variable frequency oscillators, and outputs the selected oscillating signal,
- wherein the selection section includes a plurality of selectors connected in a tree structure, each selector outputting a selected one of inputted two or more oscillating signals,
- each of the plurality of variable frequency oscillators is connected to a selector positioned at an end of the tree structure of the plurality of selectors, and
- wiring through which an oscillating signal outputted from one of the variable frequency oscillators passes until being outputted from the oscillating apparatus is shorter than wiring through which an oscillating signal outputted from at least one of the other variable frequency oscillators provided in correspondence with an oscillating band of a frequency lower than a frequency of the one variable frequency oscillator passes until being outputted from the oscillating apparatus.
3 more elements
An oscillating method comprising:
- providing a plurality of variable frequency oscillators each in correspondence with a different oscillating band from one another;
- selecting, by each of a plurality of selectors connected in a tree structure, one of two or more oscillating signals inputted from a variable frequency oscillator provided in correspondence with a designated oscillating band, from among the plurality of variable frequency oscillators, and outputting the selected oscillating signal;
- outputting, by each of the variable frequency oscillators, a differential oscillating signal;
- and
- supplying an offset voltage between a positive-side input end and a negative-side input end of a selector receiving an oscillating signal, on condition that the oscillating signal inputted to the selector is stopped.
2 more elements
Dependencies are inferred from the claim text.