how can i design am transmitter
hi
i am basic confused
in books, i read bunch of theory in pieces but i don't know how they work together. i have no idea where i would apply. so i fell difficulty
________________________________________
i am trying to design am transmitter for short distance to learn basic calculations of transmitter
AM TRANSMITTER
modulations type am modulations
frequency range 1mhz
voltage supply 12v
transmitting distance 80m-100m
audio frequency 20hz-20khz
antenna
low level modulated with linear amplifier
i know i need following circuit to make transmitter
-audio amplifier circuit
-Oscillator circuit
-RF amplifier circuit
-microphone
i need circuit that amplify the signal of mics
i know to make amplifier circuit
transistor NPN, PNP transistor
mode ce, cb, ce
class A, B, C amplifier
for design audio amplifier we select following parameters
audio source -microphone
transistor npn transistor
mode common emitter
class class A power amplifier
transistor ratings
collector emitter voltage=30v
collector base voltage=60v
emitter base voltage=5v
collector current=800mA
power=500mW
my questions
1. specification of microphone
frequency response
impedance
2what is gain of audio amplifier
3.which stage is used for audio amplifier
single stage
two stage transistor
4.what is gain of rf amplifier
5.how we decide what gain is needed for signal
6.which oscillator is used and what is frequency
wien bridge
colpit
crystal
7.what is length of antenna
if possible please explain with mathematical calculations
i don't care bad quality of transmitter
hi
i am basic confused
in books, i read bunch of theory in pieces but i don't know how they work together. i have no idea where i would apply. so i fell difficulty
________________________________________
i am trying to design am transmitter for short distance to learn basic calculations of transmitter
AM TRANSMITTER
modulations type am modulations
frequency range 1mhz
voltage supply 12v
transmitting distance 80m-100m
audio frequency 20hz-20khz
antenna
low level modulated with linear amplifier
i know i need following circuit to make transmitter
-audio amplifier circuit
-Oscillator circuit
-RF amplifier circuit
-microphone
i need circuit that amplify the signal of mics
i know to make amplifier circuit
transistor NPN, PNP transistor
mode ce, cb, ce
class A, B, C amplifier
for design audio amplifier we select following parameters
audio source -microphone
transistor npn transistor
mode common emitter
class class A power amplifier
transistor ratings
collector emitter voltage=30v
collector base voltage=60v
emitter base voltage=5v
collector current=800mA
power=500mW
my questions
1. specification of microphone
frequency response
impedance
2what is gain of audio amplifier
3.which stage is used for audio amplifier
single stage
two stage transistor
4.what is gain of rf amplifier
5.how we decide what gain is needed for signal
6.which oscillator is used and what is frequency
wien bridge
colpit
crystal
7.what is length of antenna
if possible please explain with mathematical calculations
i don't care bad quality of transmitter
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