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Bridged T Circuit
: ''For the wave filter invented by Zobel and sometimes named after him see m-derived filters.'' Zobel networks are a type of filter section based on the image-impedance design principle. They are named after Otto Zobel of Bell Labs, who published a much-referenced paper on image filters in 1923. The distinguishing feature of Zobel networks is that the input impedance is fixed in the design independently of the transfer function. This characteristic is achieved at the expense of a much higher component count compared to other types of filter sections. The impedance would normally be specified to be constant and purely resistive. For this reason, Zobel networks are also known as constant resistance networks. However, any impedance achievable with discrete components is possible. Zobel networks were formerly widely used in telecommunications to flatten and widen the frequency response of copper land lines, producing a higher performance line from one originally intended for o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M-derived Filters
m-derived filters or m-type filters are a type of electronic filter designed using the image method. They were invented by Otto Zobel in the early 1920s. This filter type was originally intended for use with telephone multiplexing and was an improvement on the existing constant k type filter. The main problem being addressed was the need to achieve a better match of the filter into the terminating impedances. In general, all filters designed by the image method fail to give an exact match, but the m-type filter is a big improvement with suitable choice of the parameter m. The m-type filter section has a further advantage in that there is a rapid transition from the cut-off frequency of the passband to a pole of attenuation just inside the stopband. Despite these advantages, there is a drawback with m-type filters; at frequencies past the pole of attenuation, the response starts to rise again, and m-types have poor stopband rejection. For this reason, filters designed using m-t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angular Frequency
In physics, angular frequency "''ω''" (also referred to by the terms angular speed, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate. It refers to the angular displacement per unit time (for example, in rotation) or the rate of change of the phase of a sinusoidal waveform (for example, in oscillations and waves), or as the rate of change of the argument of the sine function. Angular frequency (or angular speed) is the magnitude of the pseudovector quantity angular velocity.(UP1) One turn is equal to 2''π'' radians, hence \omega = \frac = , where: *''ω'' is the angular frequency (unit: radians per second), *''T'' is the period (unit: seconds), *''f'' is the ordinary frequency (unit: hertz) (sometimes ''ν''). Units In SI units, angular frequency is normally presented in radians per second, even when it does not express a rotational value. The unit hertz (Hz) is dimensionally equivalent, but by convention it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge T With Non-ideal Inductor
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Characteristic Impedance
The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Alternatively, and equivalently, it can be defined as the input impedance of a transmission line when its length is infinite. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm. The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length (lossless or lossy) that is terminated at one end with an impedance equal to the characteris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll-off
Roll-off is the steepness of a Transfer function, transfer function with frequency, particularly in network analysis (electrical circuits), electrical network analysis, and most especially in connection with filter (signal processing), filter circuits in the transition between a passband and a stopband. It is most typically applied to the insertion loss of the network, but can, in principle, be applied to any relevant function of frequency, and any technology, not just electronics. It is usual to measure roll-off as a function of logarithmic scale, logarithmic frequency; consequently, the units of roll-off are either decibels per decade (log scale), decade (dB/decade), where a decade is a tenfold increase in frequency, or decibels per octave (electronics), octave (dB/8ve), where an octave is a twofold increase in frequency. The concept of roll-off stems from the fact that in many networks roll-off tends towards a constant gradient at frequencies well away from the cut-off freque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (10) Response Plot
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (9) Practical Bridge T
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equaliser Mask
Equalizer, Equaliser, or The Equalizer may refer to: Science and technology * Equalizer (audio), a device used for adjusting the volume of different frequency bands within an audio signal * Equalizer (communications), a device or circuit for correction of frequency dependent distortion in telecommunications * Equaliser (mathematics), a construction in category theory * Whippletree (mechanism), a linkage also referred to as an equalizer Arts and entertainment * Equalizer (Datel), a game-hacking cheat cartridge by Datel * "Equalizer" (k-os song), a song by hip hop artist k-os * '' The Equalizer'', an American spy thriller television and film franchise including: ** ''The Equalizer'' (1985 TV series) ** ''The Equalizer'' (2021 TV series), reboot of the 1985 TV series ** ''The Equalizer'' (film), a 2014 film loosely based on the 1985 TV series ** ''The Equalizer 2'', a 2018 film and the sequel to the 2014 film ** ''The Equalizer 3'', an upcoming film and the sequel to the 2018 fil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (8) Band-stop
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (7) Band-pass
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (6) High-pass
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zobel (5) Low-pass
Zobel may refer to: * Zobel, a mountain range in the Ethiopian district of Kobo * Zobel (surname), including a list of people with the name * Zobel network constant resistance networks invented by Otto Zobel * Zobel de Ayala family of the Philippines * A nickname of the De La Salle-Santiago Zobel School in Muntinlupa, Philippines, named after a member of the Zobel de Ayala family. * The German name for sable The sable (''Martes zibellina'') is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia. Its habitat also borders eastern Kaza ... * The German ''Zobel''-class fast attack craft {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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