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US 2007/0176730 A1Published application
Variable attenuator
AssigneeYantel Corporation
InventorsYuejun YAN, Yuepeng YAN
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Abstract
The invention discloses a variable attenuator, comprising two or more resistors each resistor having its own effective resistance value, and means for simultaneously short circuiting at least a portion of two or more of said resistors, whereby simultaneously changing the effective resistance values. The variable attenuator of the invention is suitable for use in various high frequency and microwave circuits and systems, and has the features of a wide frequency band, small size, easy fabrication, low cost, and so on.
Claims20
A variable attenuator, comprising:
- a first resistor having a first effective resistance value;
- a second resistor having a second effective resistance value;
- a first conductive sheet;
- a second conductive sheet;
- wherein
- said first conductive sheet can be electrically contacted with at least with a portion of said first resistor whereby changing said first effective resistance value;
- and
- said second conductive sheet can be electrically contacted with at least a portion of said second resistor whereby changing said second effective resistance value.
5 more elements
A variable attenuator, comprising:
- a first resistor having a first effective resistance value;
- a second resistor having a second effective resistance value;
- and
- means for simultaneously short circuiting at least a portion of said first resistor and at least a portion of said second resistor whereby simultaneously changing said first effective resistance value and said second effective resistance value.
1 more element
A variable attenuator, comprising:
- a first resistor having a first effective resistance value;
- a second resistor having a second effective resistance value;
- and
- means for simultaneously increasing said first effective resistance value and decreasing said second effective resistance value, or means for simultaneously decreasing said first effective resistance value and increasing said second effective resistance value.
1 more element
Dependencies are inferred from the claim text.