Nonreciprocal circuit device and composite electronic component
AssigneeMurata Manufacturing Co., Ltd.
InventorsToshihiro Makino, Akihito Masuda, Takashi Kawanami, Yoshihiko Ashida
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Abstract
A nonreciprocal circuit device that avoids the problems of increased loss and narrowed frequency bandwidth when used with a low power supply voltage. An isolator (nonreciprocal circuit device) has a plurality of center electrodes (2 through 4) disposed so as to intersect and having a ferrite (5) disposed in alignment with the point of intersection, to which a DC magnetic field HDC is applied. An impedance conversion circuit (6) is added to the port of any one of center electrodes (2 through 4), setting the input impedance Zi to 2<Zi<12.5 ohms.
Claims10
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.
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.
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.
Dependencies are inferred from the claim text.