Complete Duty Cycle Control

This small Duty Cycle Control circuit is directly controlled via a voltage level, has a complete 0-100% range and can handle infinitely low as well as up to moderately high frequencies (above 100KHz). It is something you can apply to pretty much any signal that has some sort of slope to it (it just can’t have any 90° transitions such as a square wave for obvious reasons). This circuit can also trigger on any minimum voltage level (even negative voltages! but only if the control voltage is capable of producing negative voltages as well). There are only 2 conditions that must be satisfied in order to ensure it works properly: 1. The upper peak voltage level of the signal source should not exceed [Vcc-0.75v] if you want a full adjustable range. 2. The signal source must be able to sink and source current. (Doesn’t have to be much, up to a few milliamperes should definitely be adequate, but the resistor values can be manipulated to decrease current draw and still obtain an decent amount of gain if needed, but at the cost of a proportionally lower high frequency response) -Input Signal is green -Control Voltage is orange -Output Voltage is blue

published 3 years ago