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Pspice Lecture5_v1 194KB Sep 20 2011 08:28:26 AM
... 15. To calculate Rth, we need to calculate the Isc (Short circuit current) first. A short circuit, represented by a 0V voltage source, is connected to terminals a and b. ...
... 15. To calculate Rth, we need to calculate the Isc (Short circuit current) first. A short circuit, represented by a 0V voltage source, is connected to terminals a and b. ...
Luggage security system - Kaushik Science Projects
... PCBs are inexpensive, and can be highly reliable. They require much more layout effort and higher initial cost than either wire-wrapped or point-to-point constructed circuits, but are much cheaper and faster for high-volume production. Much of the electronics industry's PCB design, assembly, and qua ...
... PCBs are inexpensive, and can be highly reliable. They require much more layout effort and higher initial cost than either wire-wrapped or point-to-point constructed circuits, but are much cheaper and faster for high-volume production. Much of the electronics industry's PCB design, assembly, and qua ...
MICROWAVE MEASUREMENTS 3.1 Understand the transmission
... Are non-linear detectors that provide current in proportion to the power. It is limited to making low-power measurements. The current is proportional to the power due to the squarelaw characteristic of the crystal. This square-law characteristic only occurs for small signal levels. At larger signal ...
... Are non-linear detectors that provide current in proportion to the power. It is limited to making low-power measurements. The current is proportional to the power due to the squarelaw characteristic of the crystal. This square-law characteristic only occurs for small signal levels. At larger signal ...
G5 Questions
... A. Opposition to the flow of direct current caused by resistance B. Opposition to the flow of alternating current caused by capacitance or inductance C. A property of ideal resistors in AC circuits D. A large spark produced at switch contacts when an inductor is ...
... A. Opposition to the flow of direct current caused by resistance B. Opposition to the flow of alternating current caused by capacitance or inductance C. A property of ideal resistors in AC circuits D. A large spark produced at switch contacts when an inductor is ...
TEP Inductance of solenoids with Cobra3 TEP Inductance of
... form an oscillatory circuit. From the measurements of the natural frequencies, to calculate the inductances of the coils and determine the relationships between 1. Inductance and number of turns 2. Inductance and length 3. Inductance and radius. Set-up and procedure Set up the experiment as shown in ...
... form an oscillatory circuit. From the measurements of the natural frequencies, to calculate the inductances of the coils and determine the relationships between 1. Inductance and number of turns 2. Inductance and length 3. Inductance and radius. Set-up and procedure Set up the experiment as shown in ...
The Bride of Zen: A Single Gain Stage Preamplifier Intro This is the
... The DC input bias is delivered by the components R101, P102, R103, R105, and C102. The positive supply voltage is divided down by R101 and P102, and can be adjusted by P102. R103 and C102 provide noise filtering, and the adjusted quiet DC voltage is connected to the input through R105. To keep the ...
... The DC input bias is delivered by the components R101, P102, R103, R105, and C102. The positive supply voltage is divided down by R101 and P102, and can be adjusted by P102. R103 and C102 provide noise filtering, and the adjusted quiet DC voltage is connected to the input through R105. To keep the ...
2. Norton`s theorem
... Figure (b) shows Norton’s equivalent circuit as seen from the terminals a-b of the original circuit shown in Fig. (a). Since this is the dual of the Thevenin circuit, it is clear that Rt = Rn and IN =Voc / Rt. In fact, source transformation of Thevenin equivalent circuit leads to Norton’s equivalent ...
... Figure (b) shows Norton’s equivalent circuit as seen from the terminals a-b of the original circuit shown in Fig. (a). Since this is the dual of the Thevenin circuit, it is clear that Rt = Rn and IN =Voc / Rt. In fact, source transformation of Thevenin equivalent circuit leads to Norton’s equivalent ...
JOURNAL HEWLETT-PACKARD
... circuit is very sensi the amplifier. Consequently, at the tive. lower frequency region of oscilla A t t h e h i g h f r e tion the actual frequency is higher quency end of the than that predicted by the "reson r a n g e , t h e p h a s e ance" formula. In special cases it is possible to shift is in ...
... circuit is very sensi the amplifier. Consequently, at the tive. lower frequency region of oscilla A t t h e h i g h f r e tion the actual frequency is higher quency end of the than that predicted by the "reson r a n g e , t h e p h a s e ance" formula. In special cases it is possible to shift is in ...
Receiver2
... disadvantage of automatic gain control, attenuating even the weak signal, is overcome by the use of delayed automatic gain control . This type of system develops no AGC feedback until an established received signal strength is attained. For signals weaker than this value, no AGC is developed. Fo ...
... disadvantage of automatic gain control, attenuating even the weak signal, is overcome by the use of delayed automatic gain control . This type of system develops no AGC feedback until an established received signal strength is attained. For signals weaker than this value, no AGC is developed. Fo ...
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.