Circuit Diagram

UNDERSEA_PROPAGATION_TRANSMITTER

Published:2009/7/23 22:17:00 Author:Jessie

Develops 100-v peak signal across 100-ohm matched resistive load of crystal transducer, for mean power output of 50 w. Is fed by r-f oscillator through transmitter gate that generates voltage pulse whose width is variable from 10 to 5,000 microsec, to turn on transmitter for corresponding time. P1 and P2 are plug-in circuits that must be changed when operating frequency is changed in range of 25 to 150 kc.-W. C. Gore, Ultrasonics Tests Undersea Propagation, Electronics, 31 :35, p 32-35.   (View)

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Digital_system_ac_dc_dropout_detector

Published:2009/7/23 22:17:00 Author:Jessie

This circuit provides an indication if either or both the ac (line) or dc power to a digital system has dropped out. Fast ac-line dropout detection allows a memory-store command to be issued before dc power fails. Typically, the digital system regulators will continue to supply hold-up power for about 50 to 100 ms after ac-line dropout. This hold-up period (which should be verified in any individual application) permits adequate time to execute a memory-store operation. C1B serves as a final warning that power failure is imminent, by going low when the 5-V regulator drops below the threshold set by the selected resistors. These resistor values should be chosen so that C1B trips when the regulator input approaches the specified dropout voltage.   (View)

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Remote control circuit composed of the TWH9236/9238 miniature radio-controlled component

Published:2011/8/1 2:15:00 Author:Christina | Keyword: Remote control circuit, miniature radio-controlled component

The TWH9236/9238 miniature radio remote control transmitting/receiving component contains a key chain type transmitter and a miniature receiver. For the launch component TWH9236, the operating voltage is supplied by a Az3 type button cell, the voltage is 1.5V, the operating current is smaller than 6mA. But the operating voltage of the receiving component TWH9238 is 6V, the static current is only 1.5mA. The output voltage of the data output port is 5V, the maximum output current is 1.8mA, so it can drive the transistor directly. The remote control distance is more than 50m. The TWH9238 can form the 3 and 4-channel remote control transmitting/receiving circuits, also it can be expanded to the 9 and 16-channel remote control circuit.   (View)

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Simple_SSB_IF_amplifier

Published:2009/7/23 22:17:00 Author:Jessie

This circuit uses three SL612C amplifiers, and provides a gain of 100 dB at 9 MHz.   (View)

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Minimizing_phase_distortion_

Published:2009/7/23 22:17:00 Author:Jessie

Figure 2-15 shows a circuit used to minimize phase distortion at a mux output. MAXIM HIGH-RELIABILITY DATA Book, 1993, P. 1-46.   (View)

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SAMPLE_AND_HOLD

Published:2009/7/23 22:17:00 Author:Jessie

Uses bilateral charging to increase energy content of series of low-duty-cycle amplitude-modulated pulses resulting from demultiplexing one channel of porn pulse train. Designed for sampling and holding 0 to 5 V information received via sampled-data telemetry link.-Sample and Hold Circuit with Bilateral Charging, Electronic Circuit Design Handbook, Mactier Pub. Corp., N.Y., 1965, p 131.   (View)

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ZERO_CROSSING_SYNCHRONIZER

Published:2009/7/23 22:16:00 Author:Jessie

Variable-frequency sinusoidal wavetrain output, starting at zero crossing, is produced by gating circuit. Used to determine attenualion and velocity characteristics of ultrasonic delay lines. Covers 20 cps to 300 kc. External blocking oscillator allows use of alternative repetition rate generator when required.-J. A. Wereb, J., Zero-Crossing Technique Syncs Wavetrain Outputs, Electronics, 32:19, p 64-65.   (View)

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Isolating_capacitive_loads

Published:2009/7/23 22:16:00 Author:Jessie

Figure 2-14 shows a circuit used to isolate a mux output that feeds into a large capacitive load. MAXIM HIGH-RELIABILITY DATA Book, 1993, P. 1-46.   (View)

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BMW SRS basic circuit diagram

Published:2011/8/1 22:27:00 Author:Ecco | Keyword: BMW SRS , basic circuit

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Nokia 6110 circuit diagram 03

Published:2011/8/1 22:13:00 Author:Ecco | Keyword: Nokia 6110

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Konka 7388 cell phone cable schematic circuit diagram

Published:2011/8/1 22:31:00 Author:Ecco | Keyword: Konka 7388, cell phone cable

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Williams tube amplifier circuit diagram

Published:2011/8/1 22:32:00 Author:Ecco | Keyword: Williams , tube amplifier

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Dynaco ST70 tube amp circuit diagram

Published:2011/8/1 22:34:00 Author:Ecco | Keyword: Dynaco, tube amp

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Analog voltage limiter circuit diagram

Published:2011/8/1 22:33:00 Author:Ecco | Keyword: Analog voltage limiter

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300b tube power amp circuit diagram

Published:2011/8/1 22:43:00 Author:Ecco | Keyword: tube power amp

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Nokia 6110 circuit diagram 04

Published:2011/8/1 22:27:00 Author:Ecco | Keyword: Nokia 6110

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BMW remote control schematic circuit diagram

Published:2011/8/1 22:29:00 Author:Ecco | Keyword: BMW , remote control schematic

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Nokia 6310 circuit diagram 05

Published:2011/8/1 22:28:00 Author:Ecco | Keyword: Nokia 6310

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LOW_FREQUENCY_DOUBLER

Published:2009/7/4 20:59:00 Author:May

Signetics balanced modulator-demodulator transistor array is connected much like phase detector circuit.Output contains sum component which is twice frequency of input signal because same input signal frequency goes to both sections of balanced modulator.-Signetics Analog Data Manual, Signetics, Sunnyvale, CA, 1977, p 758.   (View)

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SIMPLE_DOUBLER_

Published:2009/7/4 20:53:00 Author:May

Performance is good up to about 10 kHz. R2 is adjusted to set FET just at cutoff under no-signal conditions, to give operation in square-law region. With R1correctly adjusted, using scope or third harmonic distortion monitor to obtain minimal distoltion, harmonic content of output can be made to approach that of sine-wave input. Article gives design equations.-R. Williams and J. Dunne, Frequency Doubler, Wireless World, Dec. 1975, p 575.   (View)

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