| 摘要 |
PURPOSE:To omit a band-pass filter which is required in case of displaying the intensity of each band signal component by providing an amplifier for every band. CONSTITUTION:An input signal is divided into plural bands by filters 9a-9n, and they are amplified by amplifiers 10a-10n provided for every band, respectively. The amplified signal of each band is mixed by a mixing circuit 12, and is outputted as an output signal V0. On the other hand, each output Va-Vn of the amplifiers 10a-10n is supplied to buffer amplifiers 14a-14n without using a band-pass filter which was required before. The outputs of the amplifiers 14a- 14n are supplied to indicators 8a-8n through detecting circuits 5a-5n and A/D converters 6a-6n. |
