Specifying Quartz Crystals
... of the fundamental mode can be significantly less expensive. A recent invention in quartz crystal processing is inverted mesa crystals, which can be manufactured with a thinner structure at higher fundamental-mode frequencies. Inverted mesa crystals provide two significant advantages: they enable le ...
... of the fundamental mode can be significantly less expensive. A recent invention in quartz crystal processing is inverted mesa crystals, which can be manufactured with a thinner structure at higher fundamental-mode frequencies. Inverted mesa crystals provide two significant advantages: they enable le ...
Standing Waves - Oregon State EECS
... 5. A lossless 600Ω open-wire transmission line of length zr = 500m, and (r = 2.25) is terminated in an impedance Zt = (400 − j300)Ω. The circuit is operated at f0 = 1MHz. (a) What is the standing-wave ratio on the line (b) Plot the voltage and current standing-wave patterns (magnitude) on the line ...
... 5. A lossless 600Ω open-wire transmission line of length zr = 500m, and (r = 2.25) is terminated in an impedance Zt = (400 − j300)Ω. The circuit is operated at f0 = 1MHz. (a) What is the standing-wave ratio on the line (b) Plot the voltage and current standing-wave patterns (magnitude) on the line ...
MOSFET Common Source Amplifiers
... The MOSFET common-source (CS) amplifier is the most widely used amplifier configuration. It gets the name from the fact that the source terminal is ‘common’ to both the input and output of the small signal equivalent circuit – it forms the a.c. ground. It has the advantages of a reasonable gain, com ...
... The MOSFET common-source (CS) amplifier is the most widely used amplifier configuration. It gets the name from the fact that the source terminal is ‘common’ to both the input and output of the small signal equivalent circuit – it forms the a.c. ground. It has the advantages of a reasonable gain, com ...
Series RLC at resonance
... input is an impulse at t = 0. Thus, the capacitor reaches full charge very quickly and becomes an open circuit— the well-known DC behaviour of a capacitor. ...
... input is an impulse at t = 0. Thus, the capacitor reaches full charge very quickly and becomes an open circuit— the well-known DC behaviour of a capacitor. ...
Q: What happens when a current has too much power?
... current has too much power? • When the resistance of a circuit is too low, the wires carry too much current. When this happens, the circuit is said to be ...
... current has too much power? • When the resistance of a circuit is too low, the wires carry too much current. When this happens, the circuit is said to be ...
Power Dissipated in Resistors - Purdue Physics
... Fuses and Circuit Breakers •In a fuse, current passes through a thin metal strip – The strip acts as a resistor with a small resistance – If a fault causes the current to become large, the increased power melts the strip to melt and the current stops – open circuit! ...
... Fuses and Circuit Breakers •In a fuse, current passes through a thin metal strip – The strip acts as a resistor with a small resistance – If a fault causes the current to become large, the increased power melts the strip to melt and the current stops – open circuit! ...
v O
... 7. Now let's measure the input impedance of the circuit. Put a 1-M Ω, pot in series with the input coupling capacitor, as shown in Fig. E4-2C. Keep lead lengths short to minimize noise pick up. Keep all of the other circuit components as in step 6, and keep VS at 0.5 Vp-p. Now while watching vo wit ...
... 7. Now let's measure the input impedance of the circuit. Put a 1-M Ω, pot in series with the input coupling capacitor, as shown in Fig. E4-2C. Keep lead lengths short to minimize noise pick up. Keep all of the other circuit components as in step 6, and keep VS at 0.5 Vp-p. Now while watching vo wit ...
Hi Friends 1. Of the following bridges the one which can be used for
... 34. In an ideal transmission line with matched load, the voltage standing wave ratio and reflection coefficient are respectively a) 1 and 1 b) infinity and 1 c) infinity and 0 d) 1 and 0 35. When an electric charge of 100 coulombs is enclosed in sphere of radius 100 m then the electric displacement ...
... 34. In an ideal transmission line with matched load, the voltage standing wave ratio and reflection coefficient are respectively a) 1 and 1 b) infinity and 1 c) infinity and 0 d) 1 and 0 35. When an electric charge of 100 coulombs is enclosed in sphere of radius 100 m then the electric displacement ...
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.