Problem on External Noise disturbing Noise-Measurement of DC Reference Voltage

A Noise-Shaped Switched-Capacitor DC-DC Voltage Regulator

This paper presents a delta-sigma control loop for a buck-boost dc-dc converter with fractional gains. The charge pump used to convert the input voltage acts as a D/A converter in the loop, and its output ripple is frequency shaped by the loop, which also provides the pulsefrequency modulation needed for the conversion. A test chip realised in a 0.72-μm CMOS process and clocked at 1MHz provided...

Power supply noise coupling in a standard voltage reference circuit

Very low-noise, high-accuracy programmable voltage reference

We have designed and tested a very low-noise, highaccuracy programmable voltage reference that is intended as an alternative to batteries for the realization of automated low-frequency noise measurement systems. The output voltage, which can be set via a built-in RS232 interface, ranges from 0 to 5 V with a resolution and long-term stability of 250 V. The power spectral density of the output vo...

Low Noise Dc Power Supplies

− Some measuring systems are very sensitive on disturbances incoming from power supplies. If no accumulators are used for their power supply, which ensure a minimum signal noise and transmission jamming signal from power network, special power supplies have to be constructed for them. An example of a possible influence of a disturbance, which spreads along to the power supply on high pure sine-...

Measuring Code Optimization Impact on Voltage Noise

In this paper, we characterize the impact of compiler optimizations on voltage noise. While intuition may suggest that the better processor utilization ensured by optimizing compilers results in a small amount of voltage variation, our measurements on a Intel R © Core2 Duo processor show the opposite – the majority of SPEC 2006 benchmarks exhibit more voltage droops when aggressively optimized....