Timing matters: traffic noise accelerates telomere loss rate differently across developmental stages

Background Noise pollution is one of the leading environmental health risks for humans, linked to a myriad of stress-related health problems. Yet little is known about the long-term effects of noise on the health and fitness of wildlife. We experimentally investigated the direct and cross-generational effects of traffic noise on telomeres; a measure of cellular ageing that is predictive of disease and longevity in humans and other organisms. We exposed zebra finches (Taenopygia guttata) to three different treatment groups: 1) parents were exposed to traffic noise before and during breeding, together with their nestling young, 2) fledged juveniles but not their parents were exposed to traffic noise, and 3) control group birds were never exposed to traffic noise. Results Although there was no significant effect of traffic noise exposure at early (pre-fledging) stages of offspring telomere length or loss rate, traffic noise exposure accelerated telomere loss in older (post-fledging) juveniles. Conclusions The age-dependent differences found in this study in telomere loss could occur if parents buffer younger offspring against the detrimental effects of noise exposure and/or if younger offspring are less sensitive to noise exposure. Telomere length during early life has been shown to be positively related to lifespan and the observed noise-induced increase of telomere attrition rate could reduce the fitness of the affected birds and potentially alter the population dynamics of birds in noise polluted areas. Our data highlight the need to consider the developmental stage of an organism to better understand the ecological consequences of anthropogenic change

CMOS instrumentation-amplifier based on ASKA cell

International audienc

CMOS sinusoidal oscillator based on current-controlled current conveyors

International audienc

A High Linear and Temperature Compensation Ring Voltage-Controlled Oscillator for Random Number Generator

International audienceIn this paper, we propose a very simple ring voltage-controlled oscillator (VCO) structure for use in a variety of applications ranging from the data encryption and mathematical simulation to the built-in-self test (BIST) of RF receivers. The proposed ring VCO has two advantages; its linearity is greatly improved compared to published VCO and the circuit is temperature compensated through a bandgap reference. The chip is fabricated in AMS 0.35 mu m CMOS technology with 2.5 V power supply. The total area is 0.02 mm(2). A series of measurement results confirm the validity of the proposed circuit. Operating at 2.5 V, the output frequency is within 300 +/- 2 MHz over the temperature range of -20 degrees C to 80 degrees C with power consumption of 400 mu W

CMOS instrumentation-amplifier based on ASKA cell

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Single ended rail-to-rail CMOS OTA based variable-frequency ring-oscillator

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OOK/NCP-FSK modulator based on coupled open-closed-loop VCOs

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XRFID : a 13.56 MHz RFID transceiver

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Fast power switching low-noise amplifier for 6–10 GHz ultra-wideband applications

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Low-noise micro-power chopper amplifier for MEMS gas sensor

In this paper, a low-noise, low-power and low voltage Chopper Stabilized CMOS Amplifier (CHS-A) is presented and simulated using transistor model parameters of the AMS 0.35 μm CMOS process. This CHS-A is dedicated to high resistive gas sensor detection. The proposed CHS-A using Chopper Stabilization technique (CHS) exhibits an equivalent input referred noise of only 0.194 nV/√Hz for a chopping frequency of 210 kHz under ۫.25 V supply voltage and 26.5 dB voltage gain. The inband PSRR is above 90 and the CMRK exceeds 120 dB. At the same simulation condition, the total power consumption is 5 μW only