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US 5,905,449 AGranted
Radio switching apparatus
AssigneeKazuo Tsubouchi
InventorsKazuo Tsubouchi, Jun Hozumi, Toshiyuki Azuma
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Abstract
A radio switching apparatus is provided which is actuated upon reception of a radio signal and which is capable zero or near-zero standby electric power consumption. The radio switching apparatus includes a receiving antenna; a surface-acoustic-wave device to which a signal received by the antenna is fed and which extracts a specific pattern contained in the signal; a storing circuit for storing output electric power of the surface-acoustic-wave device; and a switch circuit which is turned on when the output voltage of the storing circuit exceeds a set value.
Claims5
A radio switching apparatus, comprising:
- a receiving antenna;
- a surface-acoustic-wave matched filter to which a signal received by said antenna is fed and which extracts a specific pattern contained in said signal;
- a storing circuit for storing output electric power of said surface-acoustic-wave matched filter;
- and
- a switch circuit which is turned on when the output voltage of said storing circuit exceeds a set value.
2 more elements
Dependencies are inferred from the claim text.