US5945887A — Nonreciprocal circuit device and composite electr…

Claim 1

Independent Claim 67 words

A nonreciprocal circuit device comprising: a plurality of center electrodes so disposed as to intersect; and a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted for receiving a DC magnetic field; each of said center electrodes having an end which defines a port, wherein an input/output impedance Zio of the port of one of said center electrodes is set at 2<Zio<12.5 ohms.

Claim 2

Dependent Claim 67 words

A nonreciprocal circuit device comprising: a plurality of center electrodes so disposed as to intersect; and a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted for receiving a DC magnetic field; each of said center electrodes having an end which defines a port, wherein an input/output impedance Zio of the port of one of said center electrodes is set at 2<Zio<12.5 ohms.

Claim 3

Dependent Claim 77 words

A nonreciprocal circuit device comprising a plurality of center electrodes so disposed as to intersect; a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted for receiving a DC magnetic field; each of said center electrodes having an end which defines a port; and an impedance conversion circuit being connected to the port of one of said center electrodes such that the input impedance Zi of said port is set at 2<Zi<12.5 ohms.

Claim 4

Dependent Claim 77 words

A nonreciprocal circuit device comprising a plurality of center electrodes so disposed as to intersect; a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted for receiving a DC magnetic field; each of said center electrodes having an end which defines a port; and an impedance conversion circuit being connected to the port of one of said center electrodes such that the input impedance Zi of said port is set at 2<Zi<12.5 ohms.

Claim 5

Dependent Claim 35 words

A nonreciprocal circuit device according to claim 2, wherein a terminal resistor is connected to one of the remaining ports other than the port to which said impedance conversion circuit is connected, forming an isolator.

Claim 6

Dependent Claim 23 words

A nonreciprocal circuit device according to claim 2 or claim 3, wherein said impedance conversion circuit is configured as a C-L-C pi-type network.

Claim 7

Dependent Claim 23 words

A nonreciprocal circuit device according to claim 4, wherein said C-L-C pi-type network has a cut-off frequency fc which is set at 0.75×fo<fc<2×fo.

Claim 8

Dependent Claim 22 words

A nonreciprocal circuit device according to claim 2 or 3, wherein said impedance conversion circuit is configured as an L-C-L pi-type network.

Claim 9

Dependent Claim 37 words

A nonreciprocal circuit device according to claim 2 or 3, wherein said impedance conversion circuit is configured as a (2n-1)·lambda-g/4 distributed-constant transformer, where n is a natural number and lambda-g is the wavelength of a line therein.

Claim 10

Dependent Claim 120 words

A nonreciprocal circuit device comprising: a plurality of center electrodes so disposed as to intersect with each other; a magnetic assembly comprising a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted to receive a DC magnetic field; a yoke constituting a magnetic circuit for said DC magnetic field, said point of intersection being within said yoke; each of said center electrodes having an end which defines a port, matching capacitors being connected respectively to the ports of said center electrodes; and an impedance conversion circuit is connected to the port of one of said center electrodes and integrally incorporated within said yoke, whereby an input impedance Zi of said port is set at 2<Zi<12.5 ohms.

Claim 11

Dependent Claim 120 words

A nonreciprocal circuit device comprising: a plurality of center electrodes so disposed as to intersect with each other; a magnetic assembly comprising a ferrite disposed adjacent to the point of said intersection, said ferrite being adapted to receive a DC magnetic field; a yoke constituting a magnetic circuit for said DC magnetic field, said point of intersection being within said yoke; each of said center electrodes having an end which defines a port, matching capacitors being connected respectively to the ports of said center electrodes; and an impedance conversion circuit is connected to the port of one of said center electrodes and integrally incorporated within said yoke, whereby an input impedance Zi of said port is set at 2<Zi<12.5 ohms.

Claim 12

Dependent Claim 31 words

A nonreciprocal circuit device according to claim 8, wherein said impedance conversion circuit is formed in a structural component of said nonreciprocal circuit, said structural component being disposed within said yoke.

Claim 13

Dependent Claim 78 words

A composite electronic component comprising: a transmitting amplifier which operates at a power supply voltage of 6 V or less; and a nonreciprocal circuit device according to any of claims 1, 2 and 8; said nonreciprocal circuit device being connected to the output of said transmitting amplifier; said nonreciprocal circuit device and said transmitting amplifier being accommodated within a single case, said case being provided with terminals disposed in a plane for surface mounting on a circuit board.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-08-30	2003-03-01	2003-08-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-08-30	2007-03-01	2007-08-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-08-30	2011-03-01	2011-08-31	$7700.00	Window Closed / Lapsed

Nonreciprocal circuit device and composite electronic component

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