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Walkthrough Questions++
... 5. You with to generate an EMF of 4.5V by moving a wire at 4.0m/s through a 0.050T magnetic field. How long must the wire be, and what should be the angle between the field and direction of motion to use the shortest wire? ...
... 5. You with to generate an EMF of 4.5V by moving a wire at 4.0m/s through a 0.050T magnetic field. How long must the wire be, and what should be the angle between the field and direction of motion to use the shortest wire? ...
Clock Oscillator Basics
... deviation) of the variation. Also shown are the mean value of the supply voltage and the peak to peak ripple. As can be seen the crystal oscillator frequency is highly dependent on the power supply ripple. Crystal oscillator stability can also be very sensitive to temperature variation. Designers ha ...
... deviation) of the variation. Also shown are the mean value of the supply voltage and the peak to peak ripple. As can be seen the crystal oscillator frequency is highly dependent on the power supply ripple. Crystal oscillator stability can also be very sensitive to temperature variation. Designers ha ...
Document
... Antennas preform at their best when they are designed for a particular frequency and used on that frequency. However the challenge come when the antenna is to be used on more than one band. It is essential that the SWR (Standing Wave ratio) is kept as low as possible. This measurement of the antenna ...
... Antennas preform at their best when they are designed for a particular frequency and used on that frequency. However the challenge come when the antenna is to be used on more than one band. It is essential that the SWR (Standing Wave ratio) is kept as low as possible. This measurement of the antenna ...
FM – TUNER
... by the balanced mixer NE602 (or today – SA602). The fundamental parameters of the front-end transistor MPSH10 of the LNA are β = 60, fT = 650 MHz ,VBE = 0.6V at collector current of I C = 1mA . The bias circuit ...
... by the balanced mixer NE602 (or today – SA602). The fundamental parameters of the front-end transistor MPSH10 of the LNA are β = 60, fT = 650 MHz ,VBE = 0.6V at collector current of I C = 1mA . The bias circuit ...
CHAPTER 33 ALTERNATING
... L X C / (1 k) (2 10 3 s) 2 H (see Equation 33-7 and the calculation in part (a)). (c) Doubling doubles X L and halves XC , so X L would be four times X C at f 159 Hz. ...
... L X C / (1 k) (2 10 3 s) 2 H (see Equation 33-7 and the calculation in part (a)). (c) Doubling doubles X L and halves XC , so X L would be four times X C at f 159 Hz. ...
PHYS - 321 ELEMENTARY ELECTRONiCS
... A signal generator has an internal resistance called output Impedance z. ( z~50 Ohm ). A voltage divider circuit can be used to measure r and z. Adjust R until ΔVR=1/2V ! Then R = z ! ...
... A signal generator has an internal resistance called output Impedance z. ( z~50 Ohm ). A voltage divider circuit can be used to measure r and z. Adjust R until ΔVR=1/2V ! Then R = z ! ...
2) In the circuit in Fig. 1, using modified nodal analysis
... (Problems 2 and 3: Copyright © L.R.Linares 2009) ...
... (Problems 2 and 3: Copyright © L.R.Linares 2009) ...
2008. Lecture 11 (361-1
... 7.3. Oscillators for high frequencies: LC oscillators: Our aim is to develop oscillators with high frequency stability at high frequencies. We have to find a different approach because, as will be shown in the next lecture, the small-signal voltage gain decreases with frequency, and, therefore, the ...
... 7.3. Oscillators for high frequencies: LC oscillators: Our aim is to develop oscillators with high frequency stability at high frequencies. We have to find a different approach because, as will be shown in the next lecture, the small-signal voltage gain decreases with frequency, and, therefore, the ...
Crystal radio
A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio receiver, popular in the early days of radio. It needs no other power source but that received solely from the power of radio waves received by a wire antenna. It gets its name from its most important component, known as a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of copper wire for adjustment, a capacitor, a crystal detector, and earphones. They are distinct from ordinary radios as they are passive receivers, while other radios use a separate source of electric power such as a battery or the mains power to amplify the weak radio signal so as to make it louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can only receive stations within a limited range.The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun, and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose, G. W. Pickard and others.Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium around 1920.After about 1920, crystal sets were superseded by the first amplifying receivers, which used vacuum tubes (Audions), and became obsolete for commercial use. They, however, continued to be built by hobbyists, youth groups, and the Boy Scouts as a way of learning about the technology of radio. Today they are still sold as educational devices, and there are groups of enthusiasts devoted to their construction who hold competitions comparing the performance of their home-built designs.Crystal radios receive amplitude modulated (AM) signals, and can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. A few receive shortwave bands, but strong signals are required. The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.