| 摘要 |
A circuit in one embodiment of the present invention includes an integrated circuit and a folded substrate. The folded substrate includes first and second circuit portions. The first and second circuit portions are printed and aligned when the substrate is folded, to cooperate as a battery. In a first variation a third and fourth circuit portion are printed and aligned when the substrate is folded to cooperate as a switch for providing an input signal to the integrated circuit. In a further variation, a fifth and sixth circuit portion are printed and aligned when the substrate is folded to cooperate as a speaker for vibrating a portion of the substrate at an audio frequency. In yet another variation, a piezoelectric element is mounted on the substrate and coupled to the integrated circuit for vibrating a portion of the substrate at an audio frequency. |
