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US 8,089,338 B2Granted
Variable attenuator
AssigneeYantel Corporation
InventorsYuejun Yan, Yuepeng Yan
Life of this patent
Estimating the term…
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.
Claims23
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 a portion of said first resistor whereby changing said first effective resistance value according to the following figure when said first conductive sheet rotates with respect to said first resistor;
- 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 according to FIG. 16 when said second conductive sheet rotates with respect to said second resistor.
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;
- a first conductive sheet;
- a second conductive sheet;
- a base;
- an insulator, said insulator being movable with respect to said base;
- a third resistor having a third resistance value and having a first third resistor end and a second third resistor end;
- a fourth resistor having a fourth resistance value and having a first fourth resistor end and a second fourth resistor end;
- an input terminal;
- an output terminal;
- and
- a ground terminal;
- 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;
- said second conductive sheet can be electrically contacted with at least a portion of said second resistor whereby changing said second effective resistance value;
- said first resistor and said second resistor are disposed on said base;
- said first conductive sheet and said second conductive sheet are disposed on said insulator;
- said first resistor has a first resistor end and a second first resistor end;
- said input terminal is electrically connected to said first resistor end;
- said output terminal is electrically connected to said second first resistor end;
- said first resistor end is electrically connected to said first third resistor end;
- said second first resistor end is electrically connected to said first fourth resistor end;
- said second third resistor end is electrically connected to said first second resistor end;
- said second fourth resistor end is electrically connected to said first second resistor end;
- and
- said second second resistor end is electrically connected to said ground terminal.
23 more elements
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 and rotated with respect to at least with a portion of said first resistor whereby linearly changing said first effective resistance value;
- said second conductive sheet can be electrically contacted with and rotated with respect to at least a portion of said second resistor whereby non-linearly changing said second effective resistance value.
4 more elements
Dependencies are inferred from the claim text.