| 摘要 |
PURPOSE:To realize small size and low cost by using in common a ground capacitor of a primary inter-stage and secondary inter-stage at the reception of a high band and an intermediate band. CONSTITUTION:Ground capacitors 4, 5, 6 are used in an example of this execution, two capacitors are saved in comparison to conventional ground capacitors and a grounding point is used only at one point. In operating switches 7a, 7b, 8a, 8b the same as conventional example, coils 3a, 3b are grounded via the capacitor 6 at the reception of high band, coils 2a, 2b are grounded via capacitors 5, 6 at the reception of intermediate band, and coils 1a, 1b are grounded via capacitors 4, 5, 6 at the reception of low band. Thus, the number of grounding capacitors is saved without deteriorating the grounding condition. |
