OTA Schmitt-trigger - switching with the 13600

If the voltage at the differential input of an OTA, such as the XR/LM 13600, is strongly positive or negative, the output current will equal the maxi- mum value lAgc. Furthermore, a Schmitt-trigger with trigger points to the value of ± IABC • RV is obtained when the output voltage (across load resistor R) is identical to the voltage at the positive input. Therefore the switching hysteresis depends on IABC: hysteresis 9 ABC • R volt = 2 •I The control current lAgc can be influenced by changing the value of RC. Alternatively, a control voltage switching with the 13600 5V (Uc), can be connected across Rc, so that a voltage controlled hysteresis is obtained. OTA Schmitt-trigger 82610 5V 2 • R • (Uc + 3.8) hysteresis = volt Rc Exar/National application