| 摘要 |
PURPOSE:To cancel the carrier signal component and to achieve low noise, by adding carrier signals in two systems in opposite phase with each other and adding the carrier frequency component in opposite phase with a series resonance filter. CONSTITUTION:The carrier signal fed to one system is inverted at an inverting amplifier 6 and the carrier signal in opposite phase appeared at output terminals 5, 5' is added with series resonance filters C0, L0 in resonance with a multiple of the carrier frequency provided between output terminals 5, 5'. Thus, the carrier signal component can completely be rejected. |
