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555 time Delay Circuit: |
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Butterworth filter has adjustable group delay: 08/08/2002
EDN - Design Ideas / The Sallen-Key realization of a 5.25-MHz,
three-pole Butterworth filter has a gain of 2V/V and can drive
75O back-terminated coax with an overall gain of 1 (Figure 1).
Used to reconstruct component-video (Y, Pb, Pr) and RGB signals,
this filter has an insertion loss greater than 20 db at 13.5 MHz
and greater than 40 db at 27 MHz (Figure 2).. |
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Delay line has wide duty cycle range: 06/27/2002 EDN -
Design Ideas / Today's digital delay lines can process pulses no
shorter than their delay times, and that restriction confines
the devices to applications in which the duty cycle remains near
50%. A limited range of available delays (2 to 100 nsec per tap)
further limits their use. Longer delay is available with
one-shot multivibrators of standard digital-logic families, but
those devices do not retain duty-c.... |
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Delay Line implements Clock Doubler: 07/18/96 EDN-Design
Ideas |
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Delay line upgrades vintage scope: 04/18/2002 EDN - Design
Ideas / Vintage triggered-sweep oscilloscopes find use in many
applications. However, they have no internal delay line, so they
can't display the pulse that triggers the sweep. Moreover, early
laboratory scopes contain delay lines having insufficient delay
to display such pulses during a uniform portion of the sweep. . |
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Delay Simulator Debugs Communications Equipment: 10/27/94
EDN-Design Ideas |
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Feedback circuit eliminates CCD driver delay mismatch :
09/18/03 EDN-Design Ideas / In a CCD (charge-coupled device),
packets of charges shift across the array. The transistor array,
also called a bucket-brigade shift register, receives drive from
a dual-phase clock signal. Dual-phase clock signals comprise two
synchronized clock signals that are 180° out of phase. High
peak-output-current CCD drivers can buffer the logic-level clock
signals and turn them into high-voltag......
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Low Voltage, High Current Time Delay Circuit:
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Power Off Time Delay Relay Circuit: |
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Relay Delay Circuit: |
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Smooth Tone Clickless CW Sidetone Generator:
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time delay circuit: |
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Time delay relay reduces inrush current: 03/07/2002 EDN -
Design Ideas / A transformer switching onto a line can sometimes
cause a circuit breaker to trip or a fuse to blow. This
phenomenon occurs even if the transformer presents no load, such
as when the secondary is open. The problem arises because of the
heavy magnetizing inrush current in the transformer. The
amplitude of the current depends on the instant on the ac
waveform at which the transformer become... . |
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Time
Delay Relay: |
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Windshield Wiper Delay: |
