| 摘要 |
PROBLEM TO BE SOLVED: To provide a rectification circuit capable of restricting an amplitude of a signal supplied from an antenna to an appropriate value.SOLUTION: A rectification circuit 10 includes: a first terminal 17 receiving an AC voltage from an antenna 2; a second terminal 18 receiving a DC voltage from the antenna; first rectification elements 21, 22; a second rectification element 23; and a voltage rectification circuit 12. The first rectification elements 21, 22 are connected between the first terminal 17 and the second terminal 18, allow current to flow from the first terminal 17 to the second terminal 18 in a first direction, and block current flow from the second terminal 18 to the first terminal 17 in a second direction. The second rectification element 23 is connected between the first terminal 17 and the second terminal 18, allows current to flow in the second direction, and blocks current flow in the first direction. An absolute value of a first threshold which is a voltage between the first terminal 17 and the second terminal 18 when the first rectification elements 21, 22 allow current to flow differs from an absolute value of a second threshold which is a voltage between the first terminal 17 and the second terminal 18 when the second rectification element 23 allows current to flow.SELECTED DRAWING: Figure 2 |
