Understanding electronic components
... The AT89 series is an Intel 8051-compatible family of 8 bit microcontrollers (µCs). Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, and low unit cost. This allows a great amount of legacy code to ...
... The AT89 series is an Intel 8051-compatible family of 8 bit microcontrollers (µCs). Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, and low unit cost. This allows a great amount of legacy code to ...
Advanced Mixers
... The Need for Harmonic Rejection If the RF bandwidth is wider than an octave, then harmonics of the LO are downconverter to the same IF and corrupt the desired signal. Imagine operating a receiver at 800 MHz. A PA operating at 3X this frequency or 2400 MHz will couple into the receive chain and get ...
... The Need for Harmonic Rejection If the RF bandwidth is wider than an octave, then harmonics of the LO are downconverter to the same IF and corrupt the desired signal. Imagine operating a receiver at 800 MHz. A PA operating at 3X this frequency or 2400 MHz will couple into the receive chain and get ...
Paper - CPES - Virginia Tech
... most efficient operation point with zero voltage switching in wide load range [9]. In WPT application, this optimal point is sensitive to coupling change because it’s determined by leakage inductance. Therefore, it’s difficult to operate at this point in variable coupling case. As for resonant frequ ...
... most efficient operation point with zero voltage switching in wide load range [9]. In WPT application, this optimal point is sensitive to coupling change because it’s determined by leakage inductance. Therefore, it’s difficult to operate at this point in variable coupling case. As for resonant frequ ...
Zener Diode Characteristics Lab#05 - SSUET CE
... The diagram shows how they are connected, with a resistor in series to limit the current. Zener diodes can be distinguished from ordinary diodes by their code and breakdown voltage which are printed on them. Zener diode codes begin BZX... or BZY... Their breakdown voltage is printed with V in place ...
... The diagram shows how they are connected, with a resistor in series to limit the current. Zener diodes can be distinguished from ordinary diodes by their code and breakdown voltage which are printed on them. Zener diode codes begin BZX... or BZY... Their breakdown voltage is printed with V in place ...
A CBIA BIOAMPLIFIER WITH HIGH GAIN ACCURACY
... Electrical signals produced in the human body can be used for medical diagnosis and research, treatment of diseases, pilot safety etc. These signals are extracted using an electrode (or transducer) to convert the ion current in the body to electron current. After the electrode, the very low amplitud ...
... Electrical signals produced in the human body can be used for medical diagnosis and research, treatment of diseases, pilot safety etc. These signals are extracted using an electrode (or transducer) to convert the ion current in the body to electron current. After the electrode, the very low amplitud ...
Series Circuit - Spring Branch ISD
... i. Does the equivalent resistance increase or decrease? [Increase to 6 Ω] ii. Does the current increase or decrease? [ Decrease to 1.67A] iii. What happens to the voltage drop across each resistor? [ Drops 3.33 V, 5V and 1.66V] 2. I have two bulbs of [ 2 Ω and 3Ω] in Parallel connected to a battery ...
... i. Does the equivalent resistance increase or decrease? [Increase to 6 Ω] ii. Does the current increase or decrease? [ Decrease to 1.67A] iii. What happens to the voltage drop across each resistor? [ Drops 3.33 V, 5V and 1.66V] 2. I have two bulbs of [ 2 Ω and 3Ω] in Parallel connected to a battery ...
Audio Transformers - Jensen Transformers
... being drawn from the driving source, which creates additional flux just sufficient to completely cancel that created by the secondary. The result, which may surprise some, is that flux density in a transformer is not increased by load current. This also illustrates how load current on the secondary ...
... being drawn from the driving source, which creates additional flux just sufficient to completely cancel that created by the secondary. The result, which may surprise some, is that flux density in a transformer is not increased by load current. This also illustrates how load current on the secondary ...
Electroacoustic modelling of the subwoofer enclosures
... Figure 2: Developers of systematic design of ported boxes. As can be seen from figure 1, the resistive (real) part is very small at low frequencies. This is main reason why normal direct radiator loudspeakers are notoriously inefficient. The reactive part of the radiation impedance describes the extra ...
... Figure 2: Developers of systematic design of ported boxes. As can be seen from figure 1, the resistive (real) part is very small at low frequencies. This is main reason why normal direct radiator loudspeakers are notoriously inefficient. The reactive part of the radiation impedance describes the extra ...
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.