Integrated circuit device implementing 90-degree phase shifter capable of generating output signals having phase difference therebetween at improved accuracy

• US 20030151439A1
• Filed: 01/03/2003
• Published: 08/14/2003
• Est. Priority Date: 01/08/2002
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Fukuda, Takeshi
• Granted Patent: US 6,822,496 B2
• Time in Patent Office: Days
• US Class Current: 327/238
• CPC Class Codes: H03H 7/21 providing two or more phase shifted output signals, e.g. n-phase output
• CPC Class Codes: H03K 2005/00286 Phase shifter, i.e. the delay between the output and input pulse is dependent on the frequency, and such that a phase difference is obtained independent of the frequency

Abstract

Disclosed is an integrated circuit device in which a 90-degree phase shifter is implemented. The 90-degree phase shifter includes four input capacitors all having equal capacitance and four output capacitors all having equal capacitance. The input capacitors and the output capacitors are alternately arranged in a loop-shape array in plan view. Eight resistors of the 90-degree phase shifter are arranged inside the annular shape in which the capacitors are arranged.

Claims

1. An integrated circuit device in which a 90-degree phase shifter is implemented, the 90-degree phase shifter including four input capacitors all having equal capacitance, and four output capacitors all having equal capacitance, wherein

the input capacitors and the output capacitors are arranged alternately in a loop-shape array in plan view.

2. The integrated circuit device of claim 1, wherein

each input capacitor is connected to one of the output capacitors electrically in series without any other circuit component therebetween, and

each input capacitor and an output capacitor connected to the input capacitor are arranged next to each other in the loop-shape array.

3. The integrated circuit device of claim 1, wherein the 90-degree phase shifter includes four input resistors and four output resistors, and

the input resistors and the output resistors are all arranged inside the loop-shape array.

4. The integrated circuit device of claim 3, wherein

each input resistor is connected to one of the output resistors electrically in series without any other circuit component therebetween,

each input resistor and an output resistor connected to the input resistor are arranged in spatial proximity to each other, and

each input resistor is spatially closer to an input capacitor than a corresponding output resistor is to the input capacitor.

5. The integrated circuit device of claim 3, wherein

each input resistor is connected to one of the output resistors electrically in series without any other circuit component therebetween,

each input resistor and an output resistor connected to the input resistor are in spatial proximity to each other, and

each output resistor is spatially closer to an output capacitor than a corresponding input resistor is to the output capacitor.

6. The integrated circuit device of claim 3, wherein

the four input resistors all have equal resistance, and

the four output resistors all have equal resistance.

7. The integrated circuit device of claim 1, wherein

the 90-degree phase shifter includes:

an input loop circuit formed by the four input capacitors and four input resistors that are electrically looped in series in an order of a first input resistor, a first input capacitor, a second input resistor, a second input capacitor, a third input resistor, a third input capacitor, a forth input resistor, and a forth input capacitor; and

an output loop circuit formed by the four output capacitors and four output resistors that are electrically looped in series in an order of a first output resistor, a first output capacitor, a second output resistor, a second output capacitor, a third output resistor, a third output capacitor, a fourth output resistor, and a forth output capacitor,

a node between the fourth input capacitor and the first input resistor is electrically connected to a node between the first output resistor and the first output capacitor,

a node between the first input capacitor and the second input resistor is electrically connected to a node between the second output resistor and the second output capacitor,

a node between the second input capacitor and the third input resistor is electrically connected to a node between the third output resistor and the third output capacitor,

a node between the third input capacitor and the fourth input resistor is electrically connected to a node between the forth output resistor and the forth output capacitor, and

a node between the second input resistor and the second input capacitor is electrically connected to a node between the forth input resistor and the forth input capacitor.

8. An integrated circuit device in which a 90-degree phase shifter is implemented, the 90-degree phase shifter including:

a plurality of capacitors each being composed of a pair of electrodes, the pair of electrodes being arranged to be opposed to each other in a laminating direction; and

a plurality of resistors each being composed of a pair of electrodes, the pair of electrodes being arranged to be opposed to each other with a resistance film sandwiched therebetween, wherein

the capacitors and the resistors together form an input shifter and an output shifter that are cascaded,

the capacitors constituting the input shifter and the capacitors constituting the output shifter are alternately arranged in a loop-shape array in plan view, and

the resistors constituting the input shifter and the resistors constituting the output shifter are arranged inside the loop-shape array in radial symmetric relation.

9. The integrated circuit device of claim 8, wherein

the capacitors and the resistors that constitute the input shifter are respectively four in number, and

the capacitors and the resistors that constitute the output shifter are respectively four in number.

10. The integrated circuit device of claim 8, wherein

each capacitor constituting the input shifter is taken as a pair with one of the capacitors constituting the output shifter, each pair of capacitors being next to each other on the substrate, and

each pair of capacitors is connected to each other in series by a lower-positioned electrode of one capacitor being connected to an upper-positioned electrode of the other capacitor with a via.

11. The integrated circuit device of claim 8, wherein

the loop-shape array in which the capacitors are arranged is a square in plan view with the capacitors arranged three by three on each side of the square.

12. The integrated circuit device of claim 11, wherein

the 90-degree phase shifter includes a square-shaped conductive land arranged centrally of the square area encircled by the capacitors, and

the resistors are so arranged that each area between a side of the conductive land and a capacitor located outward the side includes two resisters connected to each other in series, one of the two resistors being a resistor constituting the input shifter and the other being a resistor constituting the output shifter.