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Low-cost FSK Generator - ElectroSchematics.com
https://www.electroschematics.com/low-cost-fsk-generator/
In FSK, two discrete frequencies are used to represent the binary digits 0 and 1. The heart of the circuit consists of two Wien-bridge oscillators built using a dual op amp LM1458, for the two frequencies. The two frequencies are enabled corresponding to digital data using two switches in …
Frequency Shift Keying (FSK) Generator Using PLL 565
https://bestengineeringprojects.com/frequency-shift-keying-fsk-generator-using-pll-565/
Frequency shift keying (FSK) can also be generated by applying the rectangular wave modulating signal to a VCO. Circuit diagram of such a system is shown in figure 1. The VCO output is the desired FSK signal, which is then transmitted to an FM receiver. The receiver is a standard unit up through the IF amps.
FSK - FREQUENCY SHIFT KEYING - Auburn University
https://eng.auburn.edu/~troppel/courses/TIMS-manuals-r5/TIMS%20Experiment%20Manuals/Student_Text/Vol-D1/D1-07.pdf
FSK - frequency shift keying D1 - 61 Conceptually, and in fact, the transmitter could consist of two oscillators (on frequencies f1 and f2), with only one being connected to the output at any one time. This is shown in block diagram form in Figure 2 below.
Lab6 Part A- Audio Frequency Shift Keying (AFSK)
https://inst.eecs.berkeley.edu/~ee123/sp15/lab/lab6/Lab6-Part-A-Audio-Frequency-Shift-Keying.html
AFSK1200 encodes digital binary data at a data-rate of 1200b/s. It uses the frequencies 1200Hz and 2200Hz ( center frequency of 1700 Hz ± 500 Hz) to encode the '0's and '1's (also known as space and mark) bits. Even though it has a relatively low bit-rate it is still the dominant standard for amature packet radio over VHF.
Signal Generator: Afsk - Nitrocosm
https://signals.nitrocosm.com/go/afsk/
Audio Signal Experiment Workshop Basic digital audio encoding systems Current mode: Afsk
Frequency-shift keying - Wikipedia
https://en.wikipedia.org/wiki/Frequency-shift_keying
Audio frequency-shift keying (AFSK) is a modulation technique by which digital data is represented by changes in the frequency ( pitch) of an audio tone, yielding an encoded signal suitable for transmission via radio or telephone.
8-Channel Sound Card Signal Generator Features - Daqarta
https://daqarta.com/dw_gen.htm
8-Channel Sound Card Signal Generator Features. Dreaming of the ultimate audio signal generator? Imagine a precision generator, packed with features , capable of creating all kinds of standard waveforms or arbitrary shapes. With drift-free, low-distortion signals, and a resolution of 0.0001 Hz and 0.05 degrees.
Frequency Shift Keying - FSK Modulation and Demodulation
https://www.elprocus.com/fsk-modulation-demodulation-circuit-diagram/
FSK Modulation Circuit Using 555 Timer The Circuit given here illustrates how FSK modulated wave can be generated. It is build using IC555. Square pulses are given as input to represent bit 1 and bit 0, and as an output IC555 generates FSK modulated wave. To generate square pulses one more IC555 is used.
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