Published:2013/2/21 0:47:00 Author:Ecco | Keyword: Tape recorder , clock oscillator
Tape recorder clock oscillator is shown as figure.
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Published:2013/2/19 20:37:00 Author:muriel | Keyword: 2 Transistor , FM Transmitters
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Published:2013/2/19 1:26:00 Author:Ecco | Keyword: 0 ~ +30 mV , unipolar input, 4 ~ 20mA, output , multi-functional sensor , signal conditioner
The loop power Us allowable range is +12 ~ +36 V. RL is a load resistor in the current loop, iLoop is the loop current.
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Published:2013/2/19 2:25:00 Author:Ecco | Keyword: broadband pulse generator , independently , adjustable, duty cycle
The broadband pulse generator with independently adjustable duty cycle is shown as figure.
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Published:2013/2/18 2:11:00 Author:Ecco | Keyword: Pulse oscillator, adjustable duty cycle , frequency
Pulse oscillator with adjustable duty cycle and frequency is shown as figure.
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Published:2013/2/18 0:10:00 Author:Ecco | Keyword: Signal acquisition , processing
Signal acquisition and processing circuit diagram is shown as figure.
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Published:2013/2/17 20:29:00 Author:muriel | Keyword: FM Transmitter
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Published:2013/2/17 20:27:00 Author:muriel | Keyword: Telephone Transmitter
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Published:2013/1/31 0:44:00 Author:Ecco | Keyword: Variable pitch, multivibrator
This circuit is composed of two 555 time-base circuits, and it can issue 400 ~ 2500Hz oscillatory wave with continuous changes, it is similar to the sound of public security police vehicles. The circuit consists of the boot delay, low-frequency oscillator and modulated tone generator.
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Published:2013/1/30 1:46:00 Author:Ecco | Keyword: High-stability , Wien bridge , oscillator
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Published:2013/1/30 1:48:00 Author:Ecco | Keyword: Asymmetric square wave
Asymmetric square wave circuit is shown as figure.
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Published:2013/1/30 1:47:00 Author:Ecco | Keyword: Keying freedom multivibrator
Keying freedom multivibrator circuit is shown as figure.
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Published:2013/1/29 2:26:00 Author:Ecco | Keyword: reference design , crystal oscillator
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Published:2013/1/29 2:25:00 Author:Ecco | Keyword: music scale, signal generator
The musical scale signal is a kind of oscillation pulse which is arranged a certain frequency interval, it can be generated by mechanical vibration of the various instruments, and also can be generated by oscillator composed of the electronic circuit. The oscillator with digital circuit can generate l0 octaves Loops by stepping control, and the circuit is shown in the figure. The circuit consists of basic scale oscillator, stepper pulse oscillator and scale interval control circuit and other components.
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Published:2013/1/28 2:03:00 Author:Ecco | Keyword: Harmonic generator
The harmonics generator composed of two comparators and a summing amplifier is shown in Figure. It can make use of any non- party sine, triangle, sawtooth waveform to get the harmonic which can be widely used in phase-locked loop, waveform generator, electronic musical instruments and other harmonic applications.
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Published:2013/1/28 2:11:00 Author:Ecco | Keyword: Frequency shift , keying, FSK, square wave generator
The keying signal is applied to control input end-pin 9 of CD4046, when the keying input is 1 level, the circuit will generate 2.4kHz audio frequency; when the input is 0 level, it will generate l.2kHz audio frequency. High - frequency tones are preset by the component values of Cl and Rl, and low-frequency tones is preset by the value of Cl, R2 and R3.
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Published:2013/1/28 2:14:00 Author:Ecco | Keyword: Oblique wave generator
The external capacitor connected to CD4046's pin ⑥, ⑦ is divided into two parts, namely grounded. Because their charge and discharge time is different, the waveform generated by voltage-controlled oscillator can have a huge difference in the rising and falling edges.
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Published:2013/1/22 21:21:00 Author:muriel | Keyword: simple, TRF receiver
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Published:2013/1/22 21:19:00 Author:muriel | Keyword: Switched, resistor modulator
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Published:2013/1/22 21:18:00 Author:muriel | Keyword: Switched , resistor modulator
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