Simple high-frequency signal generator

Published:2011/4/20 6:51:00 Author:Ecco | Keyword: Simple , high-frequency , signal generator | From:SeekIC

The chart shows a simple high-frequency signal generator. Changing the inductance of LC resonant circuit by the band switch Sl will change the frequency range of high frequency oscillation. This machine can be divided into four stages: the first stage is in 0.4 ~ 2MHz; the second stage is in 2 ~ 10MHz; the third stage is in 9 ~ 45MNz; fourth stage is in 60 ~ 110MHz. Components Selection: VTl, VT2 use the NPN silicon tube with fT ≥ 800MHz, β ≥ 100 of, such as 9018, C535 and so on. All resistors use 1/8W carbon film resistors. Capacitor C5 uses a monolithic capacitor or other ceramic capacitor. L2, L3, L4, L5 use high-frequency magnetic inductors and they can also be self-wound. Ll uses Φ0.6mm high strength wire with 8 flat close turns, and it is wound as the coil with inner diameter in Φ7mm . Sl uses the two-pole four roll band switch.



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