Position: Index > Oscillator Circuit >
  • Qrp Sidetone Generator Code Practice Oscillator Circuit

    2016-08-25 08:15:5462

    For use with low-power transmitters with a positive keying voltage. Q1/Q2/Q3 form a switching amplifier. When the key is pressed, the collector of Q3 g...

  • QRP_SIDETONE_GENERATOR_CODE_PRACTICE_OSCILLATOR

    2016-08-25 07:38:1059

    For use with low-power transmitters with a positive keying voltage. Q1/Q2/Q3 form a switching amplifier. When the key is pressed, the collector of Q3 g...

  • Astable oscillator frequency adjustable siren

    2016-08-25 07:24:0160

    Tone is made adjustable by using multiposition switch to change capacitors in oscillator circuit. Speed (rate of change in frequency) of siren is adjus...

  • KEYER_OSCILLATOR

    2016-08-25 06:30:2559

    Oscillator or clock starts when key is closed and can be held until dot, dash, or space is completed. U1 is SN7400, and U2 is SN74L04. Diodes at input ...

  • Square Wave Oscillator using Comparator/Op-Amp (1N4148)

    2016-08-25 04:51:2860

    This article describes the Square Wave Oscillator using Comparator / Op-Amp (1N4148). The content is very simple, very helpful. Components in this arti...

  • Low_frequency_precision_RC_oscillator

    2016-08-25 03:16:2163

    This circuit shows a precision RC oscillator, where the frequency is determined by the equation 0.72/(R1C1). The circuit is particularly useful for fre...

  • TWIN_OSCILLATOR_METAL_DETECTOR

    2016-08-25 01:40:5959

    Metal object near search coil changes frequency of oscillator A1 which is initially tuned to 160 kHz,thereby changing frequency of 1-kHz output derived...

  • OSCILLATOR_OR_AMPLIFIER_WITH_WIDE_FREQUENCY_RANGE

    2016-08-25 00:27:0160

    An oscillator/amplifter is resistively tunable over a wide frequency range. Feedback circuits containing operational amplifiers, resistors, and capacit...

  • Sensitive Oscillator Circuit Diagram

    2016-08-25 00:09:1059

    As shown as below, this oscillator is a type without steady-state harmony which composed of 555, R1, R3, C1 and optics triode VT. The internal resistan...

  • MORSE_PRACTICE_OSCILLATOR

    2016-08-24 21:43:0359

    A 555 timer configured as an astable multivibrator is used in this circuit to generate an audio note. C1 can be changed to vary the audio note as desir...

  • OSCILLATOR_CONTROL

    2016-08-24 21:38:1162

    Digital inputs from mioroprocessor to Precision Monolithics DAC-76CX 8-bit companding D/A converter provide 8159:1 frequency range for AF oscillator, f...

  • Square-Wave Oscillator

    2016-08-24 21:31:3660

    The NE555 is connected in the astable mode and uses only three timing components (RA, RB, and Ct. A 0.01-/aF bypass capacitor is used on pin 5 for nois...

  • Norton_square_wave_oscillator

    2016-08-24 20:49:1359

    This circuit uses one section of an LM3900 to form a square-wave oscillator (with a 1-kHz output using the values shown). National Semiconductor Linear...

  • RESISTANCE_CONTROLLED_SUBCARRIER_OSCILLATOR

    2016-08-24 20:24:2659

    Required 7.5% frequency deviation is obtained with ratio of 1.5 for C1/C2.-H. L. Richter et al., Instrumenting the Explorer I Sotellite, Electronics, 3...

  • voltage control oscillator circuit composed of LH0042

    2016-08-24 20:14:0562

    This diagram is voltage controlled oscillator circuit composed of LH0042. In the circuit, A1 is a voltage follower and inverter converter circuit. It p...

  • 10_kHz_OSCILLATOR

    2016-08-24 19:12:1459

    The capacitor charges until switching vol-tage is reached. When SUS switches on, the inductor causes current to ring. When the cur-rent thru SUS drops ...

  • Crystal_oscillator_with_amplitude_modulated_output

    2016-08-24 18:45:0060

    Crystal oscillator with amplitude-modulated output. The black box crystal oscillator output is converted to DC by the AD536 PMS/DC converter. The AD536...

  • ANEMOVANE_AUDIO_OSCILLATOR

    2016-08-24 18:40:2559

    Used for telemetering wind velocity. Cam switch closes for each mile of wind that passes the anemometer cups, applying voltage to C1 and C2 in series a...

  • The Blocking Oscillator

    2016-08-24 18:06:1359

    The blocking oscillator is closely related to the two-transistor or two-tube astable circuit, except that it uses only one amplifying device. The other...

  • 70MHz Paralleled Crystal Oscillator Circuit

    2016-08-24 15:46:0459

    As shown in the figure is the 70MHz paralleled crystal oscillator circuit. The oscillator is mainly composed of transistor VT1, crystal SJT ,capacitanc...

  • Quartz crystal rectangular wave oscillator circuit

    2016-08-24 15:25:5159

    The quartz crystal rectangular wave oscillator circuit is mainly used in the new digital system clock-pulse generator. When the quartz crystal of this ...

  • EMITTER_COUPLED_BIG_LOOP_OSCILLATOR

    2016-08-24 13:25:3159

    L1 is a loop of 10 to 20 turns of insulated wire with a diameter anywhere between 4 to 4'. Oscillator frequency (7 to 30 MHz) shifts substantially when...

  • The simplest multi-oscillator circuit of photoelectric coupl

    2016-08-24 11:58:3960

    In the figure is simplest multi-oscillator circuit of photoelectric couplers. When the power is on, as the voltages on the two terminals of capacitor C...

  • SYNC_BLOCKING_OSCILLATOR

    2016-08-24 11:11:5260

    Free-running period of grounded-emitter stage is made to lock in with frequency of pulse generator, to provide synchronizing signal for conventional os...

  • SINE_COSINE_OSCILLATOR

    2016-08-24 11:02:0760

    Two oscillators in cascade with positive feedback generate two sine waves in quadrature (differing in phase by 90°). Limiting network D1-D2-R5 is used...

  • 1-20MHz quartz crystal oscillator circuit

    2016-08-24 10:48:2960

    The quartz crystal oscillator circuit which is composed of the quartz crystal resonator and the coupling capacitance of the multivibrator is as shown i...

  • Code practice oscillator

    2016-08-24 09:13:0959

    The inexpensive 7404 hex-inverter has enough amplification to handle a wide range of transducers. Closing the key completes the battery circuit and app...

  • 20_MC_POWER_OSCILLATOR

    2016-08-24 07:22:1661

    Colpitts-type common-base circuit gives power output of 500 mw to 50-ohm load, while dissipating 750 mw. –Texas Instruments Inc., “Solid-State Comm...

  • TONE_BURST_OSCILLATOR

    2016-08-24 05:44:0859

    Consists of variable-frequency magnetically coupled mvbr, with two magnetic cores driven by battery-powered transistors. Injection of current or voltag...

  • TWO_GATE_QUARTZ_OSCILLATOR

    2016-08-24 05:41:0659

    A SN7400 quartz crystal and a resistor provide a square-wave output of approximately 3.5 V. The circuit operates reliably at frequencies from 120 kHz t...

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