Circuit Diagram

IF_amplifier_for_455_kHz_or_107_MHz

Published:2009/7/20 2:15:00 Author:Jessie

IF amplifier for 455 kHz or 10.7 MHz. See table for component selection (courtesy GTE Sylvania Incorporated).   (View)

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The ABS pulling over switch and torque circuit of Shanghai GM Buick-MPV (GL8)

Published:2011/7/20 1:53:00 Author:Borg | Keyword: ABS, pulling over switch, torque circuit

The ABS pulling over switch and torque circuit of Shanghai GM Buick-MPV (GL8)   (View)

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TWO_LEVEL_REGULATION_FOR_12_V_AT_02A

Published:2009/7/20 2:15:00 Author:Jessie

Transformer provides two voltages, one for normal operation and the other to supply current during transients. Storage capacitance is only one-tenth of that needed with conventional series regulator.-F. L. Ward, Novel Bi-Level Regulator Reduces Storage Capacitance, Electronics, 35:32, p 74-75.   (View)

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05_watt_AF_amplifier_for_a_phonograph_with_a_ceramic_cartridge

Published:2009/7/20 2:14:00 Author:Jessie

0.5-watt AF amplifier for a phonograph with a ceramic cartridge. The ECG745 is an 8-pin DIP (courtesy GTE Sylvania Incorporated).   (View)

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The ABS wheel rotating speed sensor and EBCM／EBTCM circuit of Shanghai GM Buick-MPV (GL8)

Published:2011/7/20 1:56:00 Author:Borg | Keyword: ABS, wheel rotating speed sensor, EBCM／EBTCM

The ABS wheel rotating speed sensor and ABS electric/traction control unit circuit of Shanghai GM Buick-MPV (GL8)   (View)

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MICROPROCESSOR_CONTROL

Published:2009/7/20 2:13:00 Author:Jessie

Under pro-gram control, interface for MOS Technology KIM-1 microcomputer turns on transmitter of. repeater when signal arrives at receiver; pro-vides 3-min timer, CW ID timer, and tail or delay at end of transmission; and generates Morse code CW ID. Article gives flow charts and programming for basic functions, along with complete autopatch control routine. CR1 and CR2 are small-signal silicon diodes such as 1N914, U1 and U2 are 7404 TTL hex inverters.-C, M. Robbins, The Microprocessor and Repeater Control, QST, Jan. 1977, p 30-34.   (View)

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AM_broadcast_tuner_with_BF_amplifier

Published:2009/7/20 2:13:00 Author:Jessie

AM broadcast tuner with BF amplifier.All coils and transformers are standard and can be purchased at Radio Shack.The three-section tuning capacitor is also standard.Audio output with 400-hertz modulation at 30% is 80 mV(courtesy GTE Sylvania Incorporated).   (View)

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The 2.5L(LBB) and 3.0L(LW9) engine circuit of Shanghai GM Buick-Regal (14)

Published:2011/7/20 2:14:00 Author:Borg | Keyword: engine circuit, Buick-Regal

Figure 1. The 2.5L(LBB) and 3.0L(LW9) engine circuit of Shanghai GM Buick-Regal (14)   (View)

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VOLTAGE_STABILIZER_USING_FOUR_CONSTANT_CURRENT_DIODES

Published:2009/7/20 2:12:00 Author:Jessie

Value of stabilized output voltage can be adjusted by placing potentiometer in parallel with SX68 zener diode and connecting base of Q1 to slider. With this arrangement, magnitude and phase angle of output voltage setting.-T. K. Hemingway, Applications of the Constant-Current Diode, Electronics, 34:42, p 60-63.   (View)

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INVERTING_SAIYIPLE_AND_HOLD

Published:2009/7/9 23:29:00 Author:May

This illustrates another application in which the hookup versatility of a sample-and-hold often elimi-nates the need for a separate op amp and a sample-and-hold module. This hookup will have a some-what higher input-to-output feedthrough during hold than the noninverting connection, since the output impedance is an open-loop value during hold. The feedthrough will   (View)

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107_MHz_FM_wide_band_high_gain_IF_amplifier_limiter_using_an_ECG781_8_lead_TO_99

Published:2009/7/20 2:12:00 Author:Jessie

10.7 MHz FM wide-band high-gain IF amplifier-limiter using an ECG781 8-lead TO-99. Supply voltage is 8.5 volts. The circuit provides a voltage gain of 80 dB. Typical sensitivity is 50,mV at 10.7 MHz (courtesy GTE Sylvania Incorporated).   (View)

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VARYING_FREQUENCY_OSCILLATOR

Published:2009/7/9 23:29:00 Author:May

Output frequency of alarm tone generator changes continuously. With suitable ampliler and loudspeaker, can easily be heard in noisy environments where single tone or amplitudemodulated tone would go unnoticed.-A. Jnall, Varying-Frequency Warning Alarm, EEE, l2:7, p 25.   (View)

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1_watt_phonograph_amplifier_with_an_8_ohm_speaker

Published:2009/7/20 2:11:00 Author:Jessie

1-watt phonograph amplifier with an 8-ohm speaker. Intended for use with a ceramic cartridge. Sensitivity approximately 450 mV. The gain of the amplifier is determined by (R7+R10)/R5. To change the gain, alter the value of R5 and hold (R7+R10) between 1M and 2.2M. Bass boost can be eliminated by removing C4 and replacing (R7+R10) with a fixed resistor valued at 2.2M (courtesy GTE Sylvania Incorporated).   (View)

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Smith_AFC_system_for_an_FM_receiver

Published:2009/7/20 2:10:00 Author:Jessie

Smith AFC system for an FM receiver. The ECG737 is an FM detector and limiter. It uses quadrature detection and includes a voltage regulator at pin 3. The ECG734 is an FM gain block. This type of circuit is ideal for FM mobile operation (courtesy GTE Sylvania Incorporated).   (View)

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ADJUSTABLE_VOLTAGE_LIMITER

Published:2009/7/9 23:28:00 Author:May

This bipolar voltage clipper can be built with two transistors, two resistors, and two potentiometers.Notice that the maximum p-p range must be ≤ BVebo of the transistors used. The design equations are:   (View)

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AM_broadcast_tuner_with_two_IF_amplifiers

Published:2009/7/20 2:09:00 Author:Jessie

AM broadcast tuner with two IF amplifiers. Audio output with 400-hertz modulation at 30% is 80 mV. All coils, transformers and variable capacitors are standard.The tuning capacitor is a two-section type with the antenna section at 18 to 28 pF and trimmed and the oscillator section at 25 to 35 pF and trimmed. Pads can be purchased at Radio Shack (courtesy GTE Sylvania Incorporated).   (View)

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TRANSIENT_PULSE_DETECTOR

Published:2009/7/9 23:28:00 Author:May

Delermines occurrence of single spike pulse hoving moximum amplitude of 50 v at 2 ma and durotion of 1 millisec. Spike pulse is stepped down by transformer to 5 v at 20 ma, which is sufficident to fire GE C10 scr, causing 28-v lamp to come on. When reset button is pressed, str cuts off, lump goes out, and circuit is ready for another spike. C1 is 0.1 mid and CR1 is IN270.-Transient Spike Pulse Detector, Electronic Circuit Design Handbook, Mactier Pub. Corp., N.Y., p 204.   (View)

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READING_SAWTOOTH_CO_NTROLLING_FLIP_FLOP

Published:2009/7/20 2:08:00 Author:Jessie

When flip-flop output is negative with respect to zero-set reference voltage, sow tooth output is dropped through diode gate to reference voltage. Start-sawtooth pulse makes output of flip-flop positive.-H. L. Daniels and D. K. Sampson, Magnetic Drum Provides Analog Time Delay, Electronics, 32:6, p 44-47.   (View)

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TRACK_AND_HOLD_SAMPLE_AND_HOLD

Published:2009/7/9 23:27:00 Author:May

Channel 1 is wired as a voltage follower and is turned on during the track/sample time. If the product of R × C is sufficiently short compared to the period of maximum output frequency, or sample time; Cwill charge to the output level. Channel 2 is an integrator with zero input signal. When channel 2 is then turned on, the output will remain at the voltage across C.   (View)

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VARIABLE_AMPLITUDE_TUNNEL_DIODE_OSCILLATOR

Published:2009/7/20 2:07:00 Author:Jessie

Attenuating resistor RA varies magnitude of oscillator swing, so oscillator operates over limited highly linear portion of diode conductance curve.- Transistor Manual, Seventh Edition, General Electric Co., 1964, p 351.   (View)

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