VOLTAGE CONTROLLED TUNABLE FILTERING ATTENUATOR USING PIN DIODES

Pin tube as an adjustable attenuator

The PIN tube has the characteristics of low on-resistance, high off-resistance, and small capacitance between electrodes. So generally it can be used as SWITCH, and the design of adjustable attenuator; Manufacturers such as skyworks, Rohm, and nxp all sell PIN tubes. ttenuator with a low impedance driver circuit to significantly decrea the rise and fall times. At high frequencies, the lowering of attenuation- (at consta t bias) is primarily due to capaci frequency high attenuation operation.

Fiber Optic Tunable Attenuator

Most fiber-optic attenuators exhibit a relatively high return loss (at least several dozens of decibels), i. For single-mode devices, the insertion loss can not depend on the direction of propagation, as long as no non-reciprocal parts are used, as e.

Suriname Adjustable Attenuator Principle

Attenuators are usually passive devices made from simple voltage divider networks. Switching between different resistances forms adjustable stepped attenuators and continuously adjustable ones using potentiometers. A 3 dB pad reduces power to one half, 6 dB to one fourth, 10 dB to one tenth, 20 dB to one hundredth, 30 dB to one thousa.

Greek Adjustable Attenuator

between different resistances forms adjustable stepped attenuators and continuously adjustable ones using.

Fiber optic transceiver attenuator

As light in fibers often does not have a well defined polarization state, it is important that a fiber-optic attenuator exhibits only a minimum amount of polarization dependence. Generally, the obtained insertion loss has some dependence on the optical wavelength. For multimode devices, however, some loss difference is possible in conjunction with a mode dependence.

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