An LDO regulator downstream from the switching converter combines the efficiency of a switching converter with the inherent power supply rejection ratio (PSRR) of the LDO regulator to clean the noisy output. Ho
How to improve linear regulator power supply ripple rejection and output noiseThe open-loop gain of the feedback loop (A) is the critical contributor to the PSRR of the linear regulator above the roll-off frequency of the bandgap low-pass filter and up to the 0dB crossover frequency. There...
Power Supply Noise Sensitivity of Analog Signal Processing DevicesThe sensitivity of the load to power supply ripple can be quantified by two parameters:Power supply rejection ratio (PSRR) Power supply modulation ratio (PSMR)Power Supply Rejection Ratio (PSRR)...
PSRR Power Supply Rejection Ratio PSRR Power Supply Ripple Rejection PSRR Power Supply Ripple Rejection (circuit measurement) PSRR Port Service Request Register (computing) PSRR Product and Support Requirements Request (Sprint) PSRR Preliminary System Requirements Review PSRR Primary Shadow RTO.k Replication...
It may be easier for you to remember this stuff using A, V, R and W for Amps, Volts, Resistance and Watts in these equations. For example the lower left Watts section shows three ways to calculate power: Volts * Amps or Amps squared * Resistance or Volts squared / Resistance....
The device uses the following formula to calculate the power: pinn = 2 ∙ Kp + Ki 1 1 − z− 1 err (2) where err is equal to the voltage error (target output voltage - real output voltage) divided by VerrLSB = 0.473 V (in case standard bulk partitioning resis...
Using equation, you can calculate the total unadjusted error of the current-sense amplifiers shown in Table 1. The error from the common-noise rejection ratio is relatively small, and you can ignore it. The INA188 has the least error among the amplifiers liste...
The amount of current consumed by each section can be used to calculate the approximate heat generated. Through your analysis, if the digital section with the microcontroller generates more heat, you can implement forced convection using a fan or provide vents nearby for the airflow. ...
By prepro- cessing the captured image data (for example, dark- and flat-field correc- tion) and performing a compute-inten- sive inversion of the radiative trans- form equation (RTE), it's possible to calculate magnetic-field vectors from pixel data. Together with standard data compression,...
Such a filter will be very large in physical size due to the large value inductors and capacitors. The second approach for filtering supply noise is to use a low- noise, high-power supply rejection ratio (PSRR) LDO as a filter. This results in a much smaller and cheaper solution. Note ...