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...zero" and an alarm condition. Some installations still use pneumatic control today. Modern I/P converters (current-to-pressure transducers) are available to convert the 4-20mA control loops to common pneumatic ranges, such as 3-15psi, 1-18psi, 3-27psi, and 6-30psi....

/A) or OPAM, must be used for adjustment, the circuit in Figure 2 can be used. The circuit in Figure 1 is a variable current source that can be used to perform a ±10% adjustment of the converter's output voltage. The auxiliary output is preloaded by RLF and an overvoltage zener diode to prevent any...

AnalogicTech's AAT115X switch mode buck converters require that the output inductor ripple current be limited to 30% to 40% of the rated current at the maximum input voltage (Eq. 1). This limits the peak switch current while still providing a good ramp slope for the PWM peak current mode comparator...

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