As the electronics industry continues to evolve, ELMEC (ELectronics and MEChanics) utilizes our own unique, state-of-the-art electronics and mechanical technologies to accurately meet its more demanding and diversified needs.

Since its foundation in 1981, ELMEC has continued to develop innovative, compact high-speed delay lines to meet the needs of this rapidly changing era in electronic devices. ELMEC has worked hard to establish a product line of high-speed delay lines compatible with various high-speed logic components. Figure 1 below shows the correspondence between ELMEC's delay lines and the logic components that play a central role in this high-speed era.

The shape of delay lines has changed from the widely used SIP, to SMD. We make custom delay lines, too. Let us know your requirements and we will make every effort to meet your needs. ELMEC will respond to your future packaging needs as they continue to evolve.

1. Super High-Speed, High-Density Delay Lines

With distributed constant or lumped constant structures, ELMEC’s delay line components have a super high-speed, high-density design achieved through our unique development process to make the most of your logic applications.

The distributed constant types, the SIP FDC type and the SMD CDA type, are made using a unique micro strip pattern for an extremely dense formation and super high speed. The lumped constant types have an extremely compact form housing high-density components. The FDC and FDD types have a 15-section structure rather than the normal 5-section structure used by other companies.Therefore,even with the same delay time, our cutoff frequency is higher. This makes it possible to pass very high-speed signals.

2. High-Resolution Variable Mechanisms

ELMEC has succeeded in developing high-resolution variable mechanisms that can obtain resolutions higher than those previously available.

VDA and VDS type high-speed variable delay lines have been designed for superior performance.The VDS type houses a 20 section delay component. This allows 20-step variability, each step being a 5% increment. The VDS has over 40 mechanical stability step points, and is designed to obtain delay time changes at a finer level than 5% demonstrating the capabilities of these high-resolution variable mechanisms.

We were able to achieve an irregular 40 step variability by combining the qualities of delay line components with a variable mechanism. With 40 step variability, you would expect the rate of change to be 2.5%/step. However, the function is irregular so although 2 steps are equal to 5%, it is possible to alternately obtain changes which divide those intervals to a ratio of approximately 3.5:6.5; which are changes of approximately 1.75% and 3.25% (See below). With the VDA type, a division ratio of 2:8 is obtained with 15 sections and 30 steps. When one observes the waveforms of the delay time changes by moving the adjustment knob, at first the changes appear unusual, but under actual operating conditions there is no problem and the design is efficient.

20 Variable Steps Previous Technology

40 Variable Steps New Technology

3. High-Stability Variable Mechanisms

The output waveform does not cut out during movement of the adjustment knobs for VDA, VDJ, VDK, and VDS types. This makes waveform observation during adjustment possible.

The guaranteed life of contact switches is 100 full movements from side to side. The majority of use involves a switching frequency of 10 times or less. Therefore, ten times the average usage should be more than sufficient for most customers. This number does not mean that reliability is low, but rather that the variable mechanism is extremely stable under vibration and shock. It also withstands environmental conditions and changes over time.