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Tapered Attenuator Network for Mitigating Direct Current (dc) Biasing Inductor Self-Resonant Effects in Traveling Wave Amplifiers

A traveling wave amplifier and attenuator technology, which can be used in amplifiers, amplifiers with distributed constants in coupling networks, amplifiers with semiconductor devices/discharge tubes, etc., and can solve problems such as increasing the cost of broadband amplifiers

Active Publication Date: 2019-03-12
MICROSEMI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The required tapered wound ferrite core inductor presenting the proper impedance adds to the cost of the wideband amplifier

Method used

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  • Tapered Attenuator Network for Mitigating Direct Current (dc) Biasing Inductor Self-Resonant Effects in Traveling Wave Amplifiers
  • Tapered Attenuator Network for Mitigating Direct Current (dc) Biasing Inductor Self-Resonant Effects in Traveling Wave Amplifiers
  • Tapered Attenuator Network for Mitigating Direct Current (dc) Biasing Inductor Self-Resonant Effects in Traveling Wave Amplifiers

Examples

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Embodiment Construction

[0018] The subject matter described herein includes a traveling wave amplifier with a tapered multi-segment attenuator network for mitigating the self-resonant effects of a DC bias inductor. figure 1 is a diagram showing an exemplary traveling wave amplifier with an inductor based DC biasing circuit at the amplifier output terminals. exist figure 1 In the amplifier 100 includes a plurality of gain stages 102 connected in a ladder network. Each gain stage 102 may be a single transistor amplifier, such as a single MOSFET amplifier. In alternative implementations, each gain stage 102 may include multiple transistors. In the example shown, the amplifier 100 includes an inductive DC bias circuit 104 at the output terminals. The bias circuit 104 includes an inductor 106 and a DC voltage source 108 . Bias circuit 104 provides DC bias for the transistors making up gain stage 102 . The amplifier 100 also includes a back end 110 to absorb reflections from the gain stage 102 and fro...

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Abstract

The subject matter described herein includes a traveling wave amplifier with a tapered attenuator network for mitigating the self-resonant effects of a DC bias inductor. An exemplary amplifier includes a plurality of gain stages connected in a ladder network for successively amplifying forward traveling waves induced by an input signal to produce an output signal. The amplifier further includes a back end coupled to the gain stage for absorbing backward traveling waves generated by reflections from the gain stage and amplifier output. The amplifier further includes an inductive DC bias circuit coupled to the gain stage near the rear end for providing a DC bias to the gain stage. The amplifier further includes a tapered multi-section frequency selective attenuator network connected between the DC bias circuit and the first of the gain stages for reducing self-resonant effects of the inductive DC bias circuit on the output signal.

Description

[0001] priority statement [0002] This application claims the benefit of US Patent Application Serial No. 13 / 436,802, filed March 30, 2012; the entire disclosure of which is incorporated herein by reference. technical field [0003] The subject matter disclosed herein relates to traveling wave amplifiers. More specifically, the subject matter disclosed herein relates to tapered attenuator networks for mitigating direct current (DC) bias inductor self-resonant effects in traveling wave amplifiers. Background technique [0004] Wideband amplifiers require a DC bias that will operate efficiently over the entire operating frequency range of the wideband amplifier. Some broadband amplifiers, such as traveling wave amplifiers used in telecommunications switching networks, need to operate from the kilohertz range to tens or hundreds of gigahertz. Some wideband amplifiers use biasing resistors and current sources to provide a DC bias for the amplifier. One problem with using bia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/60
CPCH03F3/195H03F3/605H03F2200/108
Inventor J·W·梅耶J·奥尔
Owner MICROSEMI CORP