Radio. - This is electronic circuit schematic of FM Transmitter Based CD4069 IC Without Using Coil like in Figure 1 below. In this circuit schematic the basic component used are Varicap Diode and CD4069 IC.
In here we will give you global description about FM Transmitter Based CD4069 IC Without Using Coil and then we will give you link to continue your reading from original source as external website.
In here we will give you global description about FM Transmitter Based CD4069 IC Without Using Coil and then we will give you link to continue your reading from original source as external website.
Circuit Schematic
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| Figure 1. Circuit Schematic FM Transmitter Based CD4069 IC Without Using Coil (Source: Eleccircuits) |
Component Part
- R1_____________6.8K
- R2_____________10K
- R3_____________1K
- R4_____________1M
- R5_____________100K
- R6_____________1.5M
- Capacitors
- C1, C3__________0.1uF 50V Polyester capacitors
- C2_____________10uF 25V Electrolytic capacitors
- C4_____________100pF 50V Polyester capacitors
- C5_____________100uF 16V Electrolytic capacitors
- C6_____________22pF 50V polyester capacitors
- C7_____________0.001 uF 50V polyester capacitors
- Semiconductors
- IC1____________CD4069
- D1____________ Varicap diode
- Others
- Condenser Micro phone
- Ceramic crystal filter 10.7 MHz
Description
Circuit schematic like in Figure 1 above is Circuit Schematic FM Transmitter Based CD4069 IC Without Using Coil. Eleccircuits site describe that in Figure 1 above is RF oscillator circuit which use a inverter IC1/2 and ceramic crystal filter 10.7 MHz to use drive IC1/4 – IC1/6 by through IC1/3.
When inverter in parallel form this impedance output is low thus they can drive directly an antenna.
When output of IC1/4 – IC1/6 are square wave which have much more internal harmonic. The harmonic number 9 of frequency 10.7 MHz (96.3 MHz) will take place at the center of the FM band.
The IC1/1 is audio amplifier which signal from the the micro phone will be amplified and will send to varicap diode. This signal causes the capacitance of the varicap diode changed and make also oscillator frequency changes. Thus its occurs modulation frequency.
When inverter in parallel form this impedance output is low thus they can drive directly an antenna.
When output of IC1/4 – IC1/6 are square wave which have much more internal harmonic. The harmonic number 9 of frequency 10.7 MHz (96.3 MHz) will take place at the center of the FM band.
The IC1/1 is audio amplifier which signal from the the micro phone will be amplified and will send to varicap diode. This signal causes the capacitance of the varicap diode changed and make also oscillator frequency changes. Thus its occurs modulation frequency.
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