Published:2011/11/27 21:21:00 Author:Ecco | Keyword: Field-effect transistor, RC bridge , oscillator
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Published:2011/11/27 21:20:00 Author:Ecco | Keyword: Common , phase shift oscillator , lkHz, Quick Start, gating circuit
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Published:2011/11/28 0:38:00 Author:Ecco | Keyword: TTL , crystal oscillator
Quartz crystal and the coupling capacitorin symmetric multi-harmonic are connectedin series to form the crystal oscillator circuit, andthe quartz crystal oscillation frequency depends on the resonant frequency,not R, C.
Figure b changesthe coupling capacitorof Figure ainto the coupling resistor.
Figure c, dare the deformations of Figure a, b, but also two practical circuits.
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Published:2011/11/28 0:34:00 Author:Ecco | Keyword: VGA , sync signal, automatic oscillator
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Published:2011/11/28 0:33:00 Author:Ecco | Keyword: RC bridge , RC bridge oscillator
The principle of RC bridge:
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Published:2011/11/10 21:15:00 Author:Ecco | Keyword: RC, low-frequency oscillator circuit
The oscillator with frequency below 10Hz is very appropriate to use RC oscillator. Zener diode is used here to stabilize the rate, the output peak - peak voltage can be adjusted between 0 ~ 4V , frequency is 6.5HZ. If it uses the value in the arc, the frequency can be as low as 0.01HZ. Oscillator's absorbing current is about 3mA.
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Published:2011/11/10 20:57:00 Author:Ecco | Keyword: RC phaser oscillator
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Published:2011/11/10 20:55:00 Author:Ecco | Keyword: RC , phase-shift oscillator
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Published:2011/11/10 20:54:00 Author:Ecco | Keyword: RC bridge oscillator , equivalent circuit
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Published:2011/11/10 20:53:00 Author:Ecco | Keyword: lkHz, low-distortion , oscillator circuit
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Published:2011/11/22 20:24:00 Author:Ecco | Keyword: Narrow pulse generator
The circuit can produce a narrow pulse which is below 20ns, and the output is compatible with TTL circuit. The frequency spectrum less than 25MHz is approximately constant. Conversion selector switch 8 can change the output frequency, and the conversion selector switch 20 can change the delay time. Figure b shows the waveform diagram of M1, M2, M3 in Figure a.
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Published:2011/11/22 20:51:00 Author:Ecco | Keyword: crystal oscillator, inverter
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Published:2011/12/6 1:41:00 Author:Ecco | Keyword: front-end
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Published:2011/12/6 1:40:00 Author:Ecco | Keyword: variable gain amplifier
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Published:2011/12/6 20:32:00 Author:Ecco | Keyword: Reference voltage , op amp
The reference voltage output circuit can be composed of several operational amplifiers. When the power supply voltage is 12V , the output voltage can be +2 ~ +10 V. Properly choosing the value of resistor R , it can make the current flowing tube be adaptive to the rating voltage of the regulator.
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Published:2011/12/6 20:47:00 Author:Ecco | Keyword: Low-power , single-supply , input and output, operational amplifier
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Published:2011/12/6 1:34:00 Author:Ecco | Keyword: Single-supply, 1000 times, amplifier
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Published:2011/12/6 20:38:00 Author:Ecco | Keyword: Multi-feedback , second-order , bypass filter
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Published:2011/12/6 20:36:00 Author:Ecco | Keyword: many op-amps , connected in parallel
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Published:2011/12/6 1:35:00 Author:Ecco | Keyword: Inverted amplifier
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