| 摘要 |
A non-linear effect of a rectifier element is enhanced, an input amplitude is increased by further taking advantage of a resonance circuit, and a rectification efficiency of a rectifier circuit for detection is improved, so that the gain of an amplifier circuit at a latter stage can be set low. RF input terminals 101, 102 are applied with signals at phases opposite to each other. A signal at terminal 102 is applied to a gate of transistor M1 through capacitor C3, and a signal at terminal 101 is applied to node N1 connected with a source of transistor M1 and a gate and a drain of transistor M2 through capacitor C1. 301, 302 designate terminals applied with DC biases, and L1, C15 and L2, C16 are series resonance circuits. Half-wave double voltage rectifier circuits comprised of M1, M2, C1-C3, R1 are connected in cascade at a plurality of stages.
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