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Oscillator Circuit

Index 16



145MHz variable crystal oscillator with 200mW output

Published:2011/11/7 19:02:00 Author:Ecco | Keyword: 145MHz, variable, crystal oscillator, 200mW output

145MHz variable crystal oscillator with  200mW output
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Accurate variable frequency oscillator

Published:2011/11/7 19:01:00 Author:Ecco | Keyword: Accurate , variable frequency oscillator

Accurate variable frequency oscillator
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Continuously variable voltage -frequency Wien audio bridge oscillator circuit

Published:2011/11/11 2:40:00 Author:Ecco | Keyword: Continuously , variable, voltage -frequency , Wien , audio, bridge , oscillator

Continuously variable voltage -frequency Wien audio bridge oscillator circuit
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Inductance feedback oscillator circuit

Published:2011/11/11 2:42:00 Author:Ecco | Keyword: Inductance feedback oscillator

Inductance feedback oscillator circuit
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Capacitive feedback oscillator circuit

Published:2011/11/11 2:42:00 Author:Ecco | Keyword: Capacitive feedback oscillator

Capacitive feedback oscillator circuit
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Digital oscillator controlled by potentiometer

Published:2011/11/11 2:41:00 Author:Ecco | Keyword: Digital oscillator, potentiometer

Digital oscillator controlled by potentiometer
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Single-tube transformer oscillator circuit

Published:2011/11/11 2:35:00 Author:Ecco | Keyword: Single-tube, transformer , oscillator

Single-tube transformer oscillator circuit
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Low-offset crystal oscillator

Published:2011/11/11 2:39:00 Author:Ecco | Keyword: Low-offset , crystal oscillator

Low-offset crystal oscillator
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Low-noise FET crystal oscillator

Published:2011/11/11 2:33:00 Author:Ecco | Keyword: Low-noise, FET, crystal oscillator

Low-noise FET crystal oscillator
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Low-noise 5MHz oscillator

Published:2011/11/11 2:34:00 Author:Ecco | Keyword: Low-noise, 5MHz , oscillator

Low-noise 5MHz oscillator
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Single-tube RF oscillator

Published:2011/11/11 2:37:00 Author:Ecco | Keyword: Single-tube, RF oscillator

Single-tube RF oscillator
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Single-tube quartz crystal oscillator

Published:2011/11/11 2:29:00 Author:Ecco | Keyword: Single-tube, quartz crystal oscillator

Single-tube quartz crystal oscillator
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Magnetic pendulum oscillation circuit

Published:2011/11/11 2:30:00 Author:Ecco | Keyword: Magnetic pendulum oscillation

Magnetic pendulum oscillation circuit
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Dual-frequency crystal oscillator

Published:2011/11/3 3:40:00 Author:Ecco | Keyword: Dual-frequency , crystal oscillator

Dual-frequency crystal oscillator
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Colpitts oscillator with adjustable frequency

Published:2011/10/24 21:18:00 Author:Ecco | Keyword: Colpitts oscillator , adjustable frequency

Colpitts oscillator with adjustable frequency
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RC bridge oscillating circuit with regulating ring

Published:2011/8/19 2:28:00 Author:Jessie | Keyword: RC bridge oscillating, regulating ring

RC bridge oscillating circuit with regulating ring
Connectingregulating ring to circuit, and adjusting potentiometer Rp, then you can use an oscilloscope to observe the output wave of oscillator circuit and the change of oscillating circuit's output wave, we will realize the influence of stability of regulating ring to sinusoidal oscillator circuit performance.   (View)

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Indirect self-excited feedback astable multivibrator circuit composed of 555

Published:2011/8/23 21:10:00 Author:Ecco | Keyword: Indirect self-excited feedback , astable multivibrator , 555

Indirect self-excited feedback astable multivibrator circuit composed of 555
Indirect self-excited feedback astable multivibrator circuit composed of 555

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The 74 series digital circuit of 74123 74L123 double monostable multivibrator

Published:2011/9/18 21:07:00 Author:Ecco | Keyword: The 74 series, digital circuit, double monostable multivibrator

The 74 series digital circuit of 74123 74L123 double monostable multivibrator
The 74 series digital circuit of 74123 74L123 double monostable multivibrator

Capacitance. To improve the precision and repeatability of the pulse width, it could connect a resistance between REXT/CEXT and VCC, and open for RINT. In order to get the variable pulse width, it could connect a variable resistance between RINT and VCC. 74123, 74L123, 74LS123, 74HC123 double monostable multivibrator   (View)

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The 74 series digital circuit of 74121 74L121 monostable multivibrator

Published:2011/9/18 21:06:00 Author:Ecco | Keyword: 74 series, digital circuit, monostable multivibrator

The 74 series digital circuit of 74121 74L121 monostable multivibrator
The 74 series digital circuit of 74121 74L121 monostable multivibrator

To improve the precision and repeatability of the pulse width, it could connect a resistance between REXT/CEXT and VCC, and open for RINT. To improve pulse width, it could connect atiming resistance betweenREXT/CEXT and CEXT.   (View)

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The Colpitts oscillator

Published:2011/9/18 20:55:00 Author:Ecco | Keyword: colpitts , oscillator

The Colpitts oscillator
Figure shows the Colpitts oscillator circuit. It has a base frequency crystal, and the frequency is 1499 kHz, crystal SJT is connected to the both ends of capacitor C2, C3. Emitter divider resistor R2, R3 provide basic feedback signal, the feedback voltage is controlled by the capacitive dividers C2, C3. SJT crystal provides l499kHz sine wave signal for the base of the transistor VT after working. And it is output by VT emitter output VT. Resistors R1 provides a 18V step-down voltage for a proper bias voltage of VT, appropriately adjusting resistor R1 could make Colpitts oscillator work in the soft excitation state. Resistor R4, capacitor C5 is post-coupling circuit. Regulating capacitor C1 can fine-tune the oscillator working frequency. Adjusting potentiometer RP can change the oscillation signal output level. Selecting components: capacitors Cl, 5 ~ 20p, C2 to 51p, C3, C6 to 100p, C4 to 15p, C5 is 100μ/32V. Resistor Rl is 62kΩ, R2 is 300Ω, R3 is 2.4kΩ, R4 is 360Ω, 1/2W, R5 is 15kΩ. Potentiometer RP is 4.7kΩ. Transistor VT is 3DGl20C, 65 ≤ β ≤ 115. Zener diode VD uses 2CW58. crystal SJT uses JA5B-1499Hz.   (View)

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