Circuit arrangement

• US 6,762,655 B2
• Filed: 09/21/2001
• Issued: 07/13/2004
• Est. Priority Date: 09/23/2000
• Status: Expired due to Term

• Current Assignee: Mind Fusion, LLC (Ascend Innovation Management, LLC)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Wichern, Andreas
• Primary Examiner(s): Pascal, Robert
• Assistant Examiner(s): TAKAOKA, DEAN O
• Application Number:
  US09/960,099
• Publication Number:
  US 20020053955A1
• Time in Patent Office: 1,026 Days
• Field of Search: H03/H.709, 333/175, 333/177, 333/181, 333/184, 333/185, 336/232, 336/200, 343/700.NS, 343/895
• US Class Current: 333/175
• CPC Class Codes: H03H 5/003 comprising distributed impedance elements together with lumped impedance elements
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence

Abstract

To provide a circuit arrangement for filtering and/or selecting single frequencies or frequency ranges, particularly of signals intended for at least an integrated circuit and/or signals generated by at least an integrated circuit, said circuit arrangement (100) comprising at least two electric resonant circuits (10; 20; 30)

with at least an inductive element (12; 22; 32) and

at least a capacitive element (14; 24; 34),

which, at a given low power supply voltage, provides a dynamic range complying with the current requirements, on the one hand, and has a maximal quality factor (Q), on the other hand, and can be realized in an inherently symmetrical arrangement and combined with a differential or balanced circuit technique to be preferred in integrated techniques, it is proposed that the resonant circuits (10; 20; 30), particularly the inductive elements (12; 22; 32) are magnetically fixedly coupled to each other, and in that at least a part, preferably all resonant circuits (10; 20; 30) of the circuit arrangement (100) are arranged at or on the integrated circuit, particularly on only one metallization plate (40) of the integrated circuit, having an essentially constant ohmic resistance.

Claims

1. A circuit arrangement for filtering and/or selecting single frequencies or frequency ranges of signals, said circuit arrangement (100) comprising at least two electric resonant circuits (10;

20;

30), each resonant circuit comprising

at least an inductive element (12;

22;

32) and

at least a capacitive element;

having a capacitance other than the parasitic capacitance of remaining portions of the circuit (14;

24;

34) arranged parallel to said at least one inductive element,

characterized in that the resonant circuits (10;

20;

30) are magnetically fixedly coupled to each other, and in that all the resonant circuits (10;

20;

30) of the circuit arrangement (100) are arranged on only one metallization plate (40) of an integrated circuit, having an essentially constant ohmic resistance, said metallization plate being one of plural, and being the one having the least ohmic resistance.

2. A circuit arrangement as claimed in claim 1, characterized in that the inductive elements (12;

22;

32) are magnetically fixedly coupled to each other.

3. A circuit arrangement as claimed in claim 1, characterized in that the individual resonant circuits (10;

20;

30) are essentially arranged in a planar way on an outer surface area of the integrated circuit, and being arranged as concentrically aligned inductors.

5. A circuit arrangement as claimed in claim 1, characterized in that at least two inductive elements (12;

22;

32) which are substantially concentric and/or substantially parallel to each other, said capacitive elements are arranged linearly with respect to each other and number at least three.

6. A circuit arrangement as claimed in claim 5, characterized in that each of the inductive elements (12;

22;

32) comprises one turn.

7. A circuit arrangement as claimed in claim 5, characterized in that each of the inductive elements (12;

22;

32) comprises a plurality of turns.

4. A circuit arrangement as claimed in 1, characterized in that the geometric structure is a circle, an oval, an ellipse, a square or a rectangle.