A low-phase-error HEMT MMIC attenuator

Sjögren, Leif; Jones, W.S.; Allen, B.; Tait, D.

doi:10.1002/(sici)1098-2760(199701)14:1<3::aid-mop2>3.0.co;2-p

Cited by 1 publication

(2 citation statements)

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“…An attenuator can be synthesized in different ways depending on the requirement it has to fulfill. The increase in attenuation can be either stepped or continuous . In the first case, the control signal is set to either a logical HIGH or a logical LOW.…”

Section: Introductionmentioning

confidence: 99%

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Improved microwave attenuator topology minimizing the number of control voltages

Longhi

Colangeli

Ciccognani

et al. 2018

Micro & Optical Tech Letters

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This letter presents an improved circuit topology to minimize the number of external control voltages that are required to set the state of an N‐bit microwave digital attenuator. An alternative method to connect the control signal is proposed. Typically, the control signal is connected to the gate terminal of the field effect transistor while the source terminal is DC grounded. Here, the control signal is applied to the source terminal of the field effect transistor while the gate is connected to a fixed reference voltage. In this way, only one control voltage is necessary to set the state of single attenuator cell vs two control voltages required in the typical case. The proposed method becomes particularly beneficial as the number of bits increases (ie, >4). The topology has been validated through design, realization, and testing of a 5‐bit Monolithic Microwave Integrated Circuit (MMIC) attenuator operating over the full C‐band (4‐8 GHz).

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Section: Introductionmentioning

confidence: 99%

“…The increase in attenuation can be either stepped 5 or continuous. 6 In the first case, the control signal is set to either a logical HIGH or a logical LOW. In the second case, analogue signals are employed when the attenuation is changed continuously.…”

Section: Introductionmentioning

confidence: 99%