| 摘要 |
PURPOSE:To reduce the mutual modulation component, by connecting the element having a low impedance to the frequency less than the frequency band of the desired amplified signal between the input terminal of a transistor and the earth. CONSTITUTION:A connection is secured for the base b1 of the transistor TR1 by the coils L1 and L2 plus coupling capacitor C2 to ensure a matching over a wide band. The chock coil CH1 and by-passing capacitor C3 are connected between the base b1 and emitter e1 of the transistor TR1. Thus, a short circuit is given with a low frequency to the area between the base b1 and the emitter e1. Accordingly the level can be reduced for the spurious signal caused by the 3-dimensional distortion property of the transistor. |
