Matt circuit

How to make a temperature to pulse width converter circuit. this is a simple circuit of temperature to pulse width converter.  The LM3524 to convert the output of an LM135 temperature transducer into a pulse width which can be measured by a digital system, such as a microprocessor controlled data acquisition system. In this circuit, the LM135’s temperature-dependent output (10 mV/°K) is divided down and applied to A1’s positive input. Temperature To Pulse Width Converter Circuit Diagram: This moves A1’s output high, driving the input to the LM3524’s pulse width modulation circuitry. The LM3524 pulse-width output is clipped by the LM185 reference and integrated by the 1 MW-0.1 µF combination. The DC level across the 0.1 µF capacitor is fed back to A1’s negative input. This feedback path forces the LM3524’s output pulse width to vary in a highly linear fashion according to the potential at A1’s positive input. Here is a schematic drawing: The overall temperature to pulse width scale ...

Pulse-width modulation. It probably sounds a little confusing if you’re new to electronics. Kindof a word mashup, really. What do pulses, width, and modulation have to do with each other anyway? I remember first learning about PWM during my freshman year of college at RPI. I was in a pilot course called “Foundations of Engineering” under the excellent instruction of Professor Kevin Craig (whom I later worked for). I remember thinking later, “Hey, this PWM stuff is pretty clever!” So let’s take a look at PWM and see what we can learn.