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US 7,548,739 B2Granted
Apparatus for receiving radio signal using magnetic oscillator
AssigneeKabushiki Kaisha Toshiba
InventorRie Sato
Life of this patent
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Abstract
A receiver apparatus includes a preamplifier to amplify an input signal, an equalizer configured to subject an amplified signal to an equalization process, an identification reproducer to reproduce the input signal based on an output signal of the equalizer, and a magnetic oscillator arranged on a pre-stage of the preamplifier to improve a SN ratio of the input signal.
Claims20
An apparatus for receiving radio signal, comprising:
- a preamplifier to amplify an input signal;
- an equalizer to subject an amplified signal from the preamplifier to an equalization process;
- an identification reproducer to reproduce the input signal based on an output signal of the equalizer;
- and
- a magnetic oscillator arranged on a pre-stage of the preamplifier to improve a SN ratio of the input signal, when receiving a received signal the magnetic oscillator generating a voltage ΔV added to a voltage Vol across a resistor Ro between upper and lower electrodes of the magnetic oscillator and oscillating with an amplitude (2ΔV)1/2 and a frequency 2fo in a current domain not less than a threshold current Ith, where fo indicates a resonance frequency of a ferromagnetic layer of the magnetic oscillator.
2 more elements
An apparatus for receiving radio signal, comprising:
- an antenna of radio signal;
- a magnetic oscillator coupled to the antenna, when receiving a received signal the magnetic oscillator generating a voltage ΔV added to a voltage Vol across a resistor Ro between upper and lower electrodes of the magnetic oscillator and oscillating with an amplitude (2ΔV)1/2 and a frequency 2fo in a current domain not less than a threshold current Ith;
- an amplifier coupled to the antenna and configured to receive a signal from the antenna, the amplifier and the magnetic oscillator being coupled in parallel;
- an equalizer coupled to the amplifier and configured to receive an amplified signal from the amplifier;
- and
- a reproducer coupled to the equalizer and configured to receive an output signal of the equalizer and reproduce an output signal of the antenna.
3 more elements
Dependencies are inferred from the claim text.