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Schmitt Trigger Circuits

DPP adds versatility to VFC: 11/14/2002  EDN - Design Ideas / The basic VFC (voltage-to-frequency converter) in Figure 1 comprises an integrator (IC1) and a Schmitt-trigger circuit (IC2). The integrator converts the dc input voltage, VIN , to a linear voltage ramp, and the Schmitt trigger sets the limits of the integrator's output voltage. Feedback around both circuits provides the condition for oscillation..

Oscillator Extends Schmitt Triggers' Reach: 01/19/95 EDN-Design Ideas

Programmable Schmitt Triggers Are Digitally Controlled : 03/18/02 Electronic Design - Ideas for Design / (added 8/03) The circuit in Figure 1 is a single-supply version of a programmable Schmitt trigger, or a comparator with hysteresis. A comparator, A1, and a digitally programmable potentiometer (DPP1) are used for the...

Resistor network extends Schmitt trigger's reach: 09/13/2001 EDN - Design Ideas / The circuit in Figure 1 shows a familiar technique for converting a low-level analog signal to digital form. Resistors R1 and R2 set the quiescent dc level at the Schmitt inverter's input to a value roughly equal to the midpoint of the hysteresis band. Capacitor C1 removes dc content from VIN, such that the Schmitt trigger's input signal, VI, centers itself on the mid hysteresis level.

Schmitt Trigger has Dynamic threshold: 06/05/97 EDN-Design Ideas


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