Mixer and frequency converting apparatus

Details Mixer and frequency converting apparatus Mixer and frequency converting apparatus

2011-08-02

2011-08-02

Nguyen, Long (Department: 2816)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S326000, C327S356000

Reexamination Certificate

active

07991377

ABSTRACT:
A mixer includes: a magnetoresistive effect element including a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer; and a magnetic field applying unit that applies a magnetic field to the free magnetic layer. The mixer is operable, when a first high-frequency signal and a second high-frequency signal as a local signal are inputted, to multiply the first high-frequency signal and the second high-frequency signal using the magnetoresistive effect element and to generate a multiplication signal. A frequency converting apparatus includes the mixer and a filter operable, when a higher frequency and a lower frequency out of frequencies of the first high-frequency signal and the second high-frequency signal are expressed as f1and f2respectively, to pass one out of a frequency (f1+f2) and a frequency (f1−f2) out of the multiplication signal.

REFERENCES:
patent: 6947316 (2005-09-01), Takahashi et al.
patent: 7808229 (2010-10-01), Koga et al.
patent: 7825658 (2010-11-01), Koga et al.
Tulapurkar et al., “Spin-torque diode effect in magnetic tunnel junctions”, 2005 Nature Publishing Group, Nature Vo. 438, Nov. 17, 2005, pp. 339-342.
Suzuki et al., “Microwave Properties of Spin Injection Devices—Spontaneous Oscillation, Spin—Torque Effect and Magnetic Noise-”, Magune vol. 2, No. 6, 2007, pp. 282-290, and English language translation of Sections 3.1 and 3.3.

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