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Keywords = radio frequency variable gain amplifier (RF-VGA)

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12 pages, 3842 KB  
Article
A Compact Size Wideband RF-VGA Based on Second Generation Controlled Current Conveyors
by J. del Pino, Sunil L. Khemchandani, D. Galante-Sempere and C. Luján-Martínez
Electronics 2020, 9(10), 1600; https://doi.org/10.3390/electronics9101600 - 30 Sep 2020
Cited by 2 | Viewed by 4381
Abstract
This paper presents a methodology to design a wideband radio frequency variable gain amplifier (RF-VGA) in a low-cost SiGe BiCMOS 0.35 μm process. The circuit uses two Class A amplifiers based on second-generation controlled current conveyors (CCCII). The main feature of this [...] Read more.
This paper presents a methodology to design a wideband radio frequency variable gain amplifier (RF-VGA) in a low-cost SiGe BiCMOS 0.35 μm process. The circuit uses two Class A amplifiers based on second-generation controlled current conveyors (CCCII). The main feature of this circuit is the wideband input match along with a reduced NF (5.5–9.6 dB) and, to the authors’ knowledge, the lowest die footprint reported (62 × 44 μm2 area). The implementation of the RF-VGA based on CCCII allows a wideband input match without the need of passive elements. Due to the nature of the circuit, when the gain is increased, the power consumption is reduced. The architecture is suitable for designing wideband, low-power, and low-noise amplifiers. The proposed design achieves a tunable gain of 6.7–18 dB and a power consumption of 1.7 mA with a ±1.5 V DC supply. At maximum gain, the proposed RF-VGA covers from DC up to 1 GHz and can find application in software design radios (SDRs), the low frequency medical implant communication system (MICS) or industrial, scientific, and medical (ISM) bands. Full article
(This article belongs to the Special Issue CMOS Power Amplifier Design and Applications)
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