FM demodulation Essay example
Masters
Essay
Engineering and Construction
Pages 4 (1004 words)
Download 0
Name of student: Course Code: Instructor: Date of submission: FM demodulation using CD 4046 CMOS Phase-Locked Loop (PLL) integrated circuit. Introduction FM is obtained by the variation of the frequency components of the modulating signal voltage through a Voltage Controlled Oscillator so that the output varies according to the input signal.FM demodulation is the reverse process of modulation where the Voltage Controlled Oscillator is locked to the incoming modulated FM signal by the Phase-Locked Loop to recover the original input signal…

Introduction

The PLL has a voltage-controlled oscillator, a phase detector, and a low pass filter connected in a feedback loop. The input voltage determines the frequency of oscillation at the output of the VCO (Sedra 1998). This fosc is equal to the intermediate frequency fi required to be 470 kHz in this case. The circuit is built on a proto board according to the block diagram shown fig1 bellow; The components required are; CD 4046 CMOS Phase-Lock Loop (PLL) integrated circuit Resistors of values; 1k, 10k, 18k (2). Capacitors of values; 0.1?F, 0.01?F, 3900pF and, Breadboard. The actual circuit is realized according to the circuit shown in fig 2 bellow. The circuit components in the PLL providing a centre frequency of 470 kHz are determined according to the equation, fosc = 1/2пRC. Therefore 470000Hz*2п = 1/RC and taking R = 100K then 1/C =470000* 2п*100000= 3.386pF and the preferred value is 3400nf. ...
Download paper
Not exactly what you need?

Related papers

Digital communication schemes + AWGN channel
In digital modulation, an analog transporter signal is adjusted with a digital information flow. Digital modulation techniques can be enumerated as digital-to-analog conversion, and the corresponding demodulation or detection as analog-to-digital conversion. The most essential digital modulation schemes are found on keying, that are PSK, FSK, ASK and QAM. In the subject of PSK; acronym of…
ENGINEERING AND CONSTRUCTION
After the antennas have been excited by these currents, they start radiating radio waves. Transmitters are additionally utilized for the purposes of broadcasting and are vital equipments of communication that utilizes radio technologies (Rider, 2008). This includes equipment like cell phones, Bluetooth along with computer networks that utilize wireless technology. Transmitters are usually limited…
Project halim
The main function of the encoders and decoders is to convert parallel data to series data. Design of the control circuit The function of the control circuit will be to give an alarm to indicate the departure of the child. The communication process that will be employed is the RF communication because it is the most accepted and affordable cost solution. In the RF module, both transmitter and…
Fibre Optics
One of the modern and commonly used applications of fibre optics is high resolution visuals (HDTV) which has enabled us to view broadcasts at 1080p screen resolution which is a result of FTTc and FTTh (fibre to the curb) network. Satellites making use of fibre optics do not have to undergo lessening (fibreopticsinfo). There are generally six theories of light from which the theory of optical fibre…
quantitative asset managment laboratory
The QAM obtains its name from its two components of out of phase which are 90 degrees. Aim of the experiment The primary concern of the experiment is to design and implement a Quadrature Amplitude Modulation transmitter. The experiment aims at the student being able to understand the representation of baseband signals in constellations and to have a better knowledge of differential encoding. The…
Super Heterodyne Receiver
Contents Contents 3 1.Introduction: 4 2.Super Heterodyne Receiver: Theory: 5 2.1.Structure of Super Heterodyne Receiver: 7 3.Super Heterodyne Receiver: Features: 9 4.Super Heterodyne FM (Frequency Modulation) Receiver: 11 5.Super Heterodyne Receiver: Applications: 12 6.Advantages and Disadvantages of Super Heterodyne Receivers: 13 7.Conclusion: 13 References 14 Appendices 16 List of Figures Serial…
Sustainable Practices in FM
The Kyoto Protocol to the United Nations Framework Convention on Climate Change 1997 encourages countries to make an effort to reduce carbon emissions. Corporate social responsibility requirements for all businesses has now expanded to include a duty to reduce and control carbon emissions (Lee, 2008). In other words, as a business organization, this organization is bound by legal and corporate…