Recording/playback apparatus
AssigneeSony Corporation
InventorsShuichi Ota, Takashi Katoku, Masayasu Kaneko
Life of this patent
Estimating the term…
Abstract
A recording/playback apparatus which accommodates in a cassette shell a recording medium and which performs recording and/or playback with respect to the recording medium cassette provided with a cassette-side antenna connected to an in-cassette memory recording information regarding recording contents or the like. The apparatus includes an apparatus side antenna for effecting communication through the in-cassette memory and the cassette-side antenna, wherein an electric wave transmission portion is formed in the portion of the cassette holding member opposed to the cassette-side antenna, and wherein the apparatus-side antenna is arranged in correspondence with the electric wave transmission portion.
Claims1
A communication device that communicates data with other communication devices, the communication device comprising:
- an antenna;
- setting means for setting a resonance frequency of the antenna;
- detection means for detecting a transmission/reception state;
- and
- changing means for changing the resonance frequency of the antenna based on a detection result of the detection means,
- wherein the detection means transmits an instruction to one of the other communication devices send predetermined data, and detects the transmission/reception state based on whether the predetermined data has been received from the one of the other communication devices, and
- wherein the changing means sequentially switches the resonance frequency of said antenna.
Dependencies are inferred from the claim text.