On-chip broadband tuner design for cable modem and digital CATV

Hajirostam, M.; Martin, K.

doi:10.1109/mwscas.2005.1594366

Cited by 2 publications

(2 citation statements)

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“…Because of these reasons, a simple tunable inductor-capacitor (LC) network is employed at the output of the amplifier to achieve at least 10dB rejection at 20% offset frequency from the received channel. The center frequency of a parallel LC tank circuit is given by [9,10]: 2Equation 2shows that in order to tune the output center frequency from 30MHz to 512MHz with a given inductor value, the capacitor value needs to change (ω 2 /ω 1 ) 2 = (512/30) 2 times. This ratio is equal to 291, hence it is not possible to tune capacitors or varactors in such a wide range.…”

Section: Gain and Output Tuningmentioning

confidence: 99%

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A Highly Linear Wide-Band Tunable Lna for Military Radio Applications

Doğan¹

2018

IU-JEEE

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A wide-band tunable Low-Noise Amplifier (LNA) was designed to be used in military radios. The LNA works in the frequency range of 30-512 MHz where military walkie-talkies operate. To cover the wide range of operating frequencies, the output of amplifier is divided into four sub-bands with four separate external inductors and integrated capacitor arrays. The first part of the study analyzes the performance parameters such as the gain, tuning, matching, noise figure, and distortion. Layout of the design was completed, and post-layout simulations, including the layout parasitic effects, were run to quantify the performance. The LNA achieves a minimum of 12-dB gain across the entire operating frequency range. The minimum rejections achieved by the LNA at 10% and 20% offset from the center-tuned frequency were 7 dB and 13 dB, respectively. The LNA achieves a worst-case noise figure of 4.6 dB, and the impedance-match parameter (S11) is better than −20 dB under all the conditions. The worst cases P1dB (1-dB Compression Point) and IIP3 (3rd Order Input Intercept Point) were 9.1 dBm and 18 dBm, respectively, across frequency and process-voltage-temperature corners. The design dissipates 20 mA from a 3.3-V power supply and uses a 1.5-V power supply for capacitor array termination.

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Section: Gain and Output Tuningmentioning

confidence: 99%

“…Although there are not many examples of amplifiers for such applications in the literature, various wide-band amplifiers exist that are aimed for Cable TV systems that works in the frequency range of 50-850MHz [1][2][3]. These amplifiers use standard design approaches with high power dissipation for linearity.…”

Section: Introductionmentioning

confidence: 99%