Programmable low noise amplifier with active-inductor load

Wei, Zhuo; Gyvez, José Pineda de; Sánchez-Sinencio, E.

doi:10.1109/iscas.1998.698858

Cited by 29 publications

(15 citation statements)

References 11 publications

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“…In Figure 4A, the filter consists of a regulated cascode active inductor and a capacitor Co, which is as the same topology to what is shown in Figure 3. The regulated cascode active inductor may enlarge the equivalent inductance [ 11], and reduce the frequency of the main pole as what has been discussed above.…”

Section: The Active Low-pass Filtermentioning

confidence: 94%

A noise rejective VCO with build-in active LC filter

Guo

Xie

et al. 2011

2011 9th IEEE International Conference on ASIC

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VCO is the key component in PLLs, and is easy to be interfered by the noise on control voltage or power supply. In this article, a build-in LC filter is inserted into a single-end VCO which is named BF-VCO.The LC filter consists of a regulated cascode active inductor and a capacitor. And the low-pass bandwidth is not greater than 1.6MHz. The measurement spectrum shows that the noise received by the succeeding ring oscillator is attenuated for about 20dB, while the white noise floor changes little.

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Section: The Active Low-pass Filtermentioning

confidence: 94%

A noise rejective VCO with build-in active LC filter

Guo

Xie

et al. 2011

2011 9th IEEE International Conference on ASIC

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“…Unlike its passive counterpart, active inductor does not generate or receive real magnetic field and thus exhibits better immunity to EMI. In terms of these advantages, the active inductor has been applied extensively in RF designs, such as RF filter [11], oscillator [12], PLL [13], LNA [14] and quadrature hybrid coupler [15].…”

Section: The Regulated Cascode Active Inductormentioning

confidence: 99%

A UHF current-mode continuous-time band-pass delta sigma modulator using fully balanced active inductor

Chen

El‐Sankary

El-Masry

2010

Analog Integr Circ Sig Process

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This paper introduces a 2 GHz continuous-time (CT) fourth order current-mode (CM) band-pass 0.18 lm CMOS delta sigma modulator (DSM) utilizing a fully balanced active inductor. The proposed active inductor takes advantage of positive feedback topology and features accurate loss compensation as well as independent tunability of quality factor and resonant frequency. Based on this active inductor, a CM Ultra High Frequency (UHF) resonator is also proposed, exhibiting a very small on-chip area. Moreover, a high speed CM quantizer working with one single clock is brought into eliminate the error introduced by clock generators. The post layout simulation of the DSM exhibits a peak SNDR of 43.6 dB at 500 MHz with a 40 MHz signal bandwidth while the center frequency can be tuned between 450 and 500 MHz. The measured results give an averaged SNDR of 33 dB with 40 MHz signal bandwidth, where the center frequency is tunable from 300 MHz to 350 MHz. This design consumes only 45 mW under 1.8 V power supply and occupies an area of 0.133 mm 2 .

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“…Active inductors can be used in the input matching network or at the load side [12]. There are four different input matching techniques used in the design of narrow band CMOS LNA are discussed in [11], they are SID, PLC, SL and PL methods.…”

Section: Introductionmentioning

confidence: 99%

Low Power Low Noise Tunable Active Inductor for Narrow Band LNA Design

Manjula¹,

Malarvizhi²

2012

IJCA

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This paper presents a low power, low noise and high quality factor tunable single ended active inductor suitable for designing multiband RF front end circuits. The active inductor circuit uses differential configuration as positive transconductor and PMOS cascode structure as negative transconductor of a gyrator to reduce the noise voltage. It uses MOS transistor as a feedback resistor to provide possible negative resistance to reduce the inductor loss to enhance the quality factor. Also this structure provides wide inductive bandwidth and high resonance frequency. The tuning of center frequency and quality factor for multiband operation is achieved through the controllable current source. The center frequency tuning range of the active inductor varies from 3.9 GHz to 12.3 GHz. The designed active inductor and LNA are simulated in 180nm CMOS process using HSPICE simulation tool. Simulation results of the active inductor shows an inductive bandwidth varies from 6.45 MHz to 6.3 GHz with the center frequency 6.3 GHz. The inductance value ranges from 5nH to 550nH respectively. It has the less noise voltage of 12nV/√Hz to 5.6nV/√Hz for the designed tuning range and consumes less power of 0.65mW. The Low noise amplifier achieves the gain of 19dB, low noise figure of 2.1dB and consumes low power of 4.2mW.

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Programmable low noise amplifier with active-inductor load

Cited by 29 publications

References 11 publications

A noise rejective VCO with build-in active LC filter

A noise rejective VCO with build-in active LC filter

A UHF current-mode continuous-time band-pass delta sigma modulator using fully balanced active inductor

Low Power Low Noise Tunable Active Inductor for Narrow Band LNA Design

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