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LM311

Information on: LM311

• Datasheet Texas Instruments LM311
  Differential Comparator With Strobes
• Reset an SOC only when power is ready
  Goh Ban Hok EDN An SOC (system on chip) normally requires two power supplies one for the core supply and the other for the I/O. To properly power up the chip, you need to get one of the power supplies ready before the other, according to the SOC's power-sequence requirement. Normally, the core voltage must power up first, and the I/O voltage powers up second. Instead of direct control of the power supplies, you can control the system reset to achieve a similar goal. Figure 1 shows the ...
• Integrator Enables Simple Ohmmeter with Gigohm Range
  The Texas Instruments IVC102 precision integrator has high-quality internal capacitors. The circuit in Figure 1 allows you to measure very-high-resistance values of R X . A precision difference amplifier, a TI INA105 , applies a reference voltage to R X . During integration, a negative voltage ramp, V O , is generated at the output of the IVC102 . The two LM311 s compare the amplitude of V O with two fixed thresholds and generate the two digital signals: start and stop. Figure 1. Using an ...