| 摘要 |
PURPOSE:To increase a variable range of frequencies by changing the capacity of a varactor diode at the same level between the tuning potentials of two varactor diodes having connected cathodes respectively. CONSTITUTION:A resonator C is connected to an amplifier part D by a capacitor C1 and grounded through a resistance R1, and the intersecting point of the R1 is connected to the anode of a varactor diode D1. The cathode of the D1 is connected to the cathode of a tuning diode D2, and a tuning potential Br is applied to a connection point of both cathodes. Then the anode of the D2 is connected to an end of a resonance line L1, and this L1 is grounded partially through a resistance R5. While the other end of the L1 is connected to the cathode of a varactor diode D3 through the C3. The anode of the D3 is grounded and the potential Br is applied to the connection point of the D3 and the C3. Therefore the changing ratio is increased for the synthetic capacity for tuning. This increases the changing ratio of frequency. |
