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Slides 2 - WordPress.com
Slides 2 - WordPress.com

... • The information flows within a medium through an electric current. • The information sent by the user is converted into electrical signals ...
Quiz 3 Solutions
Quiz 3 Solutions

... load current changes changes instantaneously, e.g. when a logic gate changes states, the load voltage drop decreases by an amount ∆VL = ∆IL × Z0 . To minimize this, Z0 should be as small as possible. (d) What geometry line has the lowest characteristic impedance? Rectangular conductors spaced as clo ...
21. Frequency Response
21. Frequency Response

214 Planets and Life
214 Planets and Life

... 3) If convincing: announce to International Astronomical Union, Secretary General of the UN, inform SETI groups. 4) Make the first public announcement 5) Make data available to all. 6) Everyone carefully record & disseminate signals 7) Protect frequencies. 8) Don't broadcast back to the ETs! Require ...
(with corrections indicated in lecture) MSWord file, due session 22
(with corrections indicated in lecture) MSWord file, due session 22

... 2. Find and plot one cycle of the dc current that accompanies a three-level space vector PWM that yields a vector of 0.50 Vdc / 40° Volts. The load current is 200 Amps with a power factor of 1.00. A number for Vdc is not necessary, but if you want one, make one up and declare it. ...
Development of a prototype voice
Development of a prototype voice

... When two signals enter an RF mixer and are mixed together, new signals are seen at frequencies that are the sum and difference of the two input signals, i.e. if the two input frequencies are f1 and f2, then new signals are seen at frequencies of (f1+f2) and (f1-f2). To take an example, if two signal ...
A Test Oscillator For Ham Radio - Electrical and Information
A Test Oscillator For Ham Radio - Electrical and Information

HERO Jr POWER SUPPLY PROTECTION
HERO Jr POWER SUPPLY PROTECTION

... The antenna signal passes via Transformer 1 (TR1) into one gate of the dual gate fet and the local oscillator is injected into the other gate. The Fet acts a non linear amplifier and signal mixer. As a result the sum & difference of the received signal and local oscillator signal appear in the Fet’s ...
lecture1 - Docjava.com
lecture1 - Docjava.com

... sample/reconstruction process R Amplifier ...
frequency response & compensation
frequency response & compensation

... Closed-loop frequency response Frequency bandwidth is measured at the point where gain falls to 0.707 of maximum signal – The -3dB bandwidth Open loop configurations are extremely bandwidth limited Closed loop configuration significantly increases an opamp’s bandwidth ...
Measurement of internal work during running
Measurement of internal work during running

Project 1 - Synthesis of Musical Notes and Instrument Sounds with
Project 1 - Synthesis of Musical Notes and Instrument Sounds with

... • Task 1.3: Improve the sound by adding harmonics. True piano sounds contain several frequency components, such as second and third harmonics. Be careful to make the amplitudes of the harmonics smaller than the fundamental frequency component. Experiment what sounds the best. Write a function functi ...
Ch 3 Measurement
Ch 3 Measurement

... voltage range EFSR and the number of bits “M” in the output resistor.  Ex: if EFSR = 10 V or ±5 V, M = 8 bits or ...
AM_receiver
AM_receiver

... and thus affordable to a larger number of people. The structure of the peak detector is shown in figure P5. Assuming that the diode is ideal and that the initial transient response is passed, this is how the detector essentially works: Assume that the carrier is at one of its peaks (note that the pe ...
Trigonometric functions and sound
Trigonometric functions and sound

PHYS3610/6610 Electronics I – Final – Thursday December 10th
PHYS3610/6610 Electronics I – Final – Thursday December 10th

... d) [17 points] What is the minimal value of R B so the transistor functions as a switch in this circuit with I C =0.01A when the transistor is on? From the graph we see the base current I B must be greater than 60  A so we must have R B5V−0.6V/60×10−6=73.3k  ...
A SIGE LOW PHASE NOISE PUSH
A SIGE LOW PHASE NOISE PUSH

... This paper describes a monolithically integrated push-push oscillator fabricated in a production-near SiGe:C bipolar technology. The transistors used in this work show a maximum transit frequency f T = 200 GHz and a maximum frequency of oscillation f max = 275 GHz. For the passive circuitry transmis ...
Signal generators with FPGA
Signal generators with FPGA

... Introduction • Signal generator produces alternating current (AC) of the desired frequencies and amplitudes with the necessary modulation for testing or measuring circuits. Users are able to know what state the circuit is in when the signals are distorted, attenuated or missing entirely. Therefore, ...
Principles of Electronic Communication Systems
Principles of Electronic Communication Systems

... A wide bandwidth can be shared for the purpose of transmitting many signals at the same time. ...
Lab 6 - La Salle University
Lab 6 - La Salle University

... The voltage and current reading are not 10 V and 10 mA, respectively, because the 10 in the amplitude box represents the maximum value and the 7.07’s represent the root-meansquare (RMS) values, which are averaged over time. They differ from the maximum values by a factor 2-1/2. What are the meter re ...
Combinations of Capacitors
Combinations of Capacitors

... The voltage and current reading are not 10 V and 10 mA, respectively, because the 10 in the amplitude box represents the maximum value and the 7.07’s represent the root-meansquare (RMS) values, which are averaged over time. They differ from the maximum values by a factor 2-1/2. What are the meter re ...
QRSS Communicating at .8 WPM
QRSS Communicating at .8 WPM

... C. FSK-CW – CW encoded with two frequencies about 6 or 7 Hz apart D. Soundcard Modes – sent as SSB signals – reverse of a Fourier ...
Fiber Optic Communications - New Mexico State University
Fiber Optic Communications - New Mexico State University

Lab #7: LVDT - Montana State University
Lab #7: LVDT - Montana State University

... Gain experience with Digital Storage Oscilloscope operation while investigating the input & output characteristics of a linear variable differential transformer (LVDT). References: A. Wheeler & A Ganji, Introduction to Engineering Experimentation ETME360 Lecture & laboratory instruction Equipment: L ...
unit 3 lic ppt - WordPress.com
unit 3 lic ppt - WordPress.com

... For the single stage amplifier , the voltage gain decreases at high frequency due to the construction of transistor or the stray ...
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Heterodyne



Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies. Heterodyning is used to shift one frequency range into another, new one, and is also involved in the processes of modulation and demodulation. The two frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. In the most common application, two signals at frequencies f1 and f2 are mixed, creating two new signals, one at the sum f1 + f2 of the two frequencies, and the other at the difference f1 − f2. These new frequencies are called heterodynes. Typically only one of the new frequencies is desired, and the other signal is filtered out of the output of the mixer. Heterodynes are related to the phenomenon of ""beats"" in acoustics.A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.
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