|
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
midhysteresis level. . |
Schmitt Trigger has Dynamic threshold: 06/05/97
EDN-Design Ideas |
|
|
|
|