Variable Delay Lines

Last Updated: April 1, 2025

Description

Variable Delay Lines are devices used to introduce a controllable delay to an electrical signal. They allow for the adjustment of the time it takes for a signal to travel from the input to the output, providing flexibility in timing and synchronization tasks.

Working Principle

Variable Delay Lines operate by altering the path length or the medium through which the signal travels, thereby changing the time delay experienced by the signal. This can be achieved through various methods, such as adjusting the physical length of the transmission path or modifying the properties of the medium. These devices are useful because they enable precise control over signal timing, which is critical in applications requiring synchronization and phase alignment.

Applications

Variable Delay Lines are used in a variety of applications, including telecommunications, where they help in synchronizing data transmission across different channels. They are also employed in radar systems to adjust the timing of signal processing, and in audio engineering to create effects such as echo and reverb. Additionally, they are used in scientific research for experiments that require precise timing adjustments, such as in the observation of ultra-fast processes in physics.

Advantages over other Delay Lines

Variable Delay Lines offer the advantage of adjustability, allowing users to fine-tune the delay to meet specific requirements. This flexibility is particularly beneficial in dynamic environments where signal timing needs to be frequently adjusted. Compared to fixed delay lines, variable delay lines provide greater versatility and can be adapted to a wider range of applications without the need for multiple devices.

Limitations

One limitation of Variable Delay Lines is that they may introduce additional complexity into the system, requiring more sophisticated control mechanisms to adjust the delay accurately. Additionally, the precision of the delay adjustment can be affected by factors such as temperature variations and mechanical wear, which may impact the long-term reliability and accuracy of the device.

Considerations

When selecting Variable Delay Lines, it is important to consider factors such as initial costs, which can vary depending on the complexity and capabilities of the device. Operating expenses may include maintenance and calibration to ensure accuracy over time. Durability is another consideration, as devices exposed to harsh environments may require more frequent replacement or maintenance. Accuracy is critical, especially in applications where precise timing is essential, so choosing a device with high precision and stability is important. Replacement and maintenance costs should also be factored into the overall cost of ownership, as these can impact the long-term economic viability of the solution.

31 Results

Variable Delay Line, 1310/1550 nm, 330 ps, SMF-28 Pigtails, FC/APC -- F-VDL-2-3-FA-S - Image

Variable Delay Line, 1310/1550 nm, 330 ps, SMF-28 Pigtails, FC/APC -- F-VDL-2-3-FA-S
from Newport MKS

The F-VDL-2-3-FA-S Manually Variable Fiber Optic Delay Line provides precision optical path variation for delays of 170 to 330 ps at 1310/1550 nm. The compact and rugged design makes the device ideal for integration into network equipment and test instrumentation for precision optical path length... [See More]

Delay Line Type: Variable

Variable Delay Line, Motorized, 1310/1550 nm, 330 ps, SMF-28, FC/PC -- MDL-2-3-FP-S - Image

Variable Delay Line, Motorized, 1310/1550 nm, 330 ps, SMF-28, FC/PC -- MDL-2-3-FP-S
from Newport MKS

The MDL-2-3-FP-S Motorized Variable Optical Delay Line provides precision optical path delays 0 to 330 ps on a single mode fiber for wavelength range 1260 – 1650 nm. Driven by a DC motor with an integrated encoder, the motorized variable optical delay line offers a high delay resolution of 1... [See More]

Delay Line Type: Variable

BGA Differential HE2 Series -- HE2LAAA010D
from Thin Film Technology Corporation

High efficiency delay line for clock, data deskew in differential circuits [See More]

Delay Line Type: Variable
Package Type: Surface Mount

Delay Line Technology: Digital
Time Delay: 0.1000 to 0.5000

View Datasheet

Delay Lines -- 8S89296NLGI [8S89296NLGI from Renesas Electronics Corporation]
from Quarktwin Technology Ltd.

Delay Line IC Programmable Tap 2.2ns ~ 12.5ns 32-VFQFN Exposed Pad [See More]

Delay Line Type: Variable
Time Delay: 2.2 to 12.5

Package Type: Surface Mount; 32-VFQFN Exposed Pad

TTL Programmable Delay Line -- TT Series - Image

View Datasheet

TTL Programmable Delay Line -- TT Series
from RCD Components, Inc.

Programmable Delay Line. Construction: DIP, 16 PIN TO 64 PIN. Application: TTL, ECL. TT3 3 BIT. Total delay times from 14nS to 287nS. Incremental delays of 1nS to 40nS. 7nS zero step delay. 16-pin DIP package. TT4 4 BIT. Total delay times from 30nS to 165nS. Incremental delays of 1nS to 10nS. 15nS... [See More]

Delay Line Type: Variable
Package Type: Plugin

Delay Line Technology: Digital
Time Delay: 14 to 1040

View Datasheet

Logic Family FTTL -- DDU37F
from Data Delay Devices, Inc.

FEATURES. • Ideal for “Set and Forget ” applications. • Multi-turn adjustment screw (approx. 40 turns). • Input & output fully TTL interfaced & buffered. (10 T2L fan-out capability). • Resolution: As low as 0.12ns. • Minimum delay (TD0): 6ns typical. [See More]

Delay Line Type: Variable
Package Type: Surface Mount

Delay Line Technology: Digital
Time Delay: 15 to 170

FemtoClock LVDS Programmable Delay Line -- 854S296DKI-33LF - Image

View Datasheet

FemtoClock LVDS Programmable Delay Line -- 854S296DKI-33LF
from Integrated Device Technology

The ICS854S296I -33 is a high performance LVDS Programmable Delay Line. The delay can vary from 2.2ns to 12.5ns in 10ps steps. The ICS854S296I -33 is characterized to operate from a 3.3V power supply and is guaranteed over industrial temperature range. The delay of the device varies in discrete... [See More]

Delay Line Type: Variable
Package Type: Surface Mount; VFQFP-N 5 X 5 NO LEAD