Digital variable reactance element, phase shifter, and impedance matching circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsBo Yang, Naoki Shinohara, Tsuyoshi Kajiwara, Takayuki Okada, Takaaki Miyasako
Life of this patent
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Abstract
A digital variable reactance element includes digital capacitors and digital inductors connected in series or in parallel. Each of the digital capacitors includes a capacitor and a first digital switch connected in series or in parallel. The first digital switch is switchable between on and off states. Each of the digital inductors includes an inductor and a second digital switch connected in series or in parallel. The second digital switch is switchable between on and off states.
Claims18
A digital variable reactance element that digitally varies a reactance, the digital variable reactance element comprising:
- a plurality of digital capacitors;
- a plurality of digital inductors;
- and
- a digital resistor connected in parallel to the plurality of digital capacitors and the plurality of digital inductors;
- wherein
- the plurality of digital capacitors and the plurality of digital inductors are connected together in series or in parallel;
- each of the plurality of digital capacitors includes a capacitor and a first digital switch connected together in series or in parallel, the first digital switch being switchable between an on state and an off state;
- each of the plurality of digital inductors include an inductor and a second digital switch connected together in series or in parallel, the second digital switch being switchable between an on state and an off state;
- and
- the digital resistor includes only one resistor.
A digital variable reactance element that digitally varies a reactance, the digital variable reactance element comprising:
- a plurality of digital capacitors;
- a plurality of digital inductors;
- and
- a digital resistor connected in series to the plurality of digital capacitors and the plurality of digital inductors;
- wherein
- the plurality of digital capacitors and the plurality of digital inductors are connected together in series or in parallel;
- each of the plurality of digital capacitors includes a capacitor and a first digital switch connected together in series or in parallel, the first digital switch being switchable between an on state and an off state;
- each of the plurality of digital inductors include an inductor and a second digital switch connected together in series or in parallel, the second digital switch being switchable between an on state and an off state;
- and
- the digital resistor includes only one resistor.
Dependencies are inferred from the claim text.