Saturday, April 18, 2015

Circuit Diagram Simple IF Signal Generator using Transistors

Robotronicdiagram. - Here is simple IF signal generator using transistors circuit diagram like in figure 1 below. According this circuit diagram, IF signal generator building from oscillator using capacitors and inductor. In here we will show the circuit diagram and publisher's description of  Simple IF Signal Generator using Transistors.

Circuit Diagram

Figure 1. Circuit Diagram Simple IF Signal Generator using Transistors
(Source: electronic-circuits-diagrams)

Description

Circuit diagram like in figure 1 above is Circuit Diagram Simple IF Signal Generator using Transistors. Here is a versatile circuit of IF signal generator which may be of interest to radio hobbyists and professionals alike.Transistors T1 and T2 form an astable multivibrator oscillating in the audio frequency range of 1 to 2 kHz. RF oscillator is built around transistor T3. Here again a 455kHz ceramic filter/resonator is employed for obtaining stable IF. The AF from multivibrator is coupled from collector of transistor T2 to emitter of transistor T3 through capacitor C3. The tank circuit at collector of transistor T3 is formed using medium wave oscillator coil of transistor radio, a fixed 100pF capacitor C5 and half section of a gang capacitor (C6).

The oscillator section may be easily modified for any other intermediate frequency by using ceramic filter or resonator of that frequency and by making appropriate changes in the tank circuit at collector of transistor T3. Slight adjustment of bias can be affected by varying values of resistors R6 and R7, if required

Link Source:
  • http://www.electronic-circuits-diagrams.com/simple-if-signal-generator-circuit/


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