Analog Devices Welcomes Hittite Microwave Corporation
... 1. Set A/B control to 0/+5V, Vdd = +5V and use HCT series logic to provide a TTL driver interface. 2. Control inputs A/B can be driven directly with CMOS logic (HC) with Vdd = +5 Volts applied to the CMOS logic gates. 3. DC blocking capacitors are required for each RF port as shown. Capacitor value ...
... 1. Set A/B control to 0/+5V, Vdd = +5V and use HCT series logic to provide a TTL driver interface. 2. Control inputs A/B can be driven directly with CMOS logic (HC) with Vdd = +5 Volts applied to the CMOS logic gates. 3. DC blocking capacitors are required for each RF port as shown. Capacitor value ...
Speed-up charge pump circuit to improve lock time for integer
... ously by a programmable timing counter. Since this current being delivered to the capacitor of the ?lter (effectively a voltage) is continuous and not dependent upon the phase difference coming out of the phase frequency detector, a voltage level at the capacitor can be set very quickly. Thus, this ...
... ously by a programmable timing counter. Since this current being delivered to the capacitor of the ?lter (effectively a voltage) is continuous and not dependent upon the phase difference coming out of the phase frequency detector, a voltage level at the capacitor can be set very quickly. Thus, this ...
Chapter 17: Electrochemistry
... occurs when the electrons are transferred between the electronic conductors—the metal electrodes—and the ions or atoms at the electrode surfaces. In the liquid, the charge is conducted by ions such as the Na⫹ and Cl⫺ in the molten rock salt. Of course, ions contain electrons too, but these electrons ...
... occurs when the electrons are transferred between the electronic conductors—the metal electrodes—and the ions or atoms at the electrode surfaces. In the liquid, the charge is conducted by ions such as the Na⫹ and Cl⫺ in the molten rock salt. Of course, ions contain electrons too, but these electrons ...
Archie`s Chapter 5 - Electricity and Magnetism (ASmith)
... A nonmagnetic substance cannot be magnetized and is not attracted to a magnet. A ferromagnetic substance has the ability to acquire magnetic properties. (Iron, nickel or cobalt) A magnet is a substance with magnetic properties. It can attract ferromagnetic objects. Although it is usually made of iro ...
... A nonmagnetic substance cannot be magnetized and is not attracted to a magnet. A ferromagnetic substance has the ability to acquire magnetic properties. (Iron, nickel or cobalt) A magnet is a substance with magnetic properties. It can attract ferromagnetic objects. Although it is usually made of iro ...
Magnesium Anodes
... generic types with voltage outputs of approximately 1.55 and 1.75 volts (with reference to a copper/copper sulphate reference electrode). The performance characteristics for each type are indicated in Table 1. The 1.75 volt material is an alloy specially formulated from pure virgin magnesium and oth ...
... generic types with voltage outputs of approximately 1.55 and 1.75 volts (with reference to a copper/copper sulphate reference electrode). The performance characteristics for each type are indicated in Table 1. The 1.75 volt material is an alloy specially formulated from pure virgin magnesium and oth ...
Cavity magnetron
The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities (cavity resonators). Bunches of electrons passing by the openings to the cavities excite radio wave oscillations in the cavity, much as a guitar's strings excite sound in its sound box. The frequency of the microwaves produced, the resonant frequency, is determined by the cavities' physical dimensions. Unlike other microwave tubes, such as the klystron and traveling-wave tube (TWT), the magnetron cannot function as an amplifier, increasing the power of an applied microwave signal, it serves solely as an oscillator, generating a microwave signal from direct current power supplied to the tube.The first form of magnetron tube, the split-anode magnetron, was invented by Albert Hull in 1920, but it wasn't capable of high frequencies and was little used. Similar devices were experimented with by many teams through the 1920s and 30s. On November 27, 1935, Hans Erich Hollmann applied for a patent for the first multiple cavities magnetron, which he received on July 12, 1938, but the more stable klystron was preferred for most German radars during World War II. The cavity magnetron tube was later improved by John Randall and Harry Boot in 1940 at the University of Birmingham, England. The high power of pulses from their device made centimeter-band radar practical for the Allies of World War II, with shorter wavelength radars allowing detection of smaller objects from smaller antennas. The compact cavity magnetron tube drastically reduced the size of radar sets so that they could be installed in anti-submarine aircraft and escort ships.In the post-war era the magnetron became less widely used in the radar role. This was because the magnetron's output changes from pulse to pulse, both in frequency and phase. This makes the signal unsuitable for pulse-to-pulse comparisons, which is widely used for detecting and removing ""clutter"" from the radar display. The magnetron remains in use in some radars, but has become much more common as a low-cost microwave source for microwave ovens. In this form, approximately one billion magnetrons are in use today.