The voltage threshold for triggering a voltage-controlled delay line (VCDL) can vary depending on the specific design and implementation of the VCDL circuit. A VCDL is a type of analog circuit that introduces a variable delay in a signal path based on the control voltage applied to it. The delay time is typically adjusted by varying the control voltage.
In general, the voltage threshold for triggering a VCDL refers to the minimum or maximum voltage level required at the control input to initiate the delay. This voltage level can be specified in the circuit's datasheet or design documentation. It is important to note that this threshold voltage can vary between different VCDL designs and manufacturers.
To determine the voltage threshold for a specific VCDL, you would need to refer to the manufacturer's datasheet or technical documentation for that particular device. The datasheet should provide information on the operating characteristics, including the voltage levels required for triggering the delay line. If you're designing a circuit using a VCDL, you would need to consider this threshold voltage to ensure proper functionality and control of the delay line.