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Monostable oscillator – Circuit Schematic
Monostable oscillator
The output of a video amplifier is differentiated before being fed to a Schottky comparator. The propagation delay is reduced to typically 10ns. The output puls...
555 Astable oscillator – Circuit Schematic
555 Astable oscillator
This free-running multivibrator uses an external current sink to discharge the timing capacitor, C. Therefore, interval ^ may easily be 1000 the pulse duration...
RC oscillator – Circuit Schematic
RC oscillator
The circuit covers 15 Hz-30 kHz and is useful as a function generator....
voltage frequency synthesizer PLL – Circuit Schematic
voltage frequency synthesizer PLL
The µA2240 consists of four basic circuit elements: (1) a time-base oscillator, (2) an eight-bit counter, (3) a control flip-flop, and (4) a voltage regulato...
Triangle-square wave VCO – Circuit Schematic
Triangle-square wave VCO
The VCO has two buffered outputs; a triangle wave and a square wave. Frequency is dependent on the output voltage swing of the Schmitt trigger, IC2. Superior pe...
Wide frequency oscillator – Circuit Schematic
Wide frequency oscillator
An oscillator/amplifier is resistively tunable over a wide frequency range. Feedback circuits containing operational amplifiers, resistors, and capacitors synth...
A sine-cosine generator – Circuit Schematic
A sine-cosine generator
The scheme presented delivers waveforms from any function generator producing a triangular output and a synchronized TTL square wave. A1 and A2 act as a two-pha...
Low frequency divider – Circuit Schematic
Low frequency divider
The ratio of capacitors Cl and C2 determines division. With a positive pulse applied to the base of Ql, assume that Cl = C2 and that Cl and C2 are discharged. W...
Frequency doubler – Circuit Schematic
Frequency doubler
Adding components Q3, D3, and resistors R3 through R6 to a conventional complementary symmetry class AB buffer can double the frequency of an input sine wave. ...
Frequency tripler – Circuit Schematic
Frequency tripler
The turn-on and turn-off characteristics of two complementary transistors can be combined to attain nonselective frequency tripling. The resulting circuit handl...
Astable flip-flop with starter – Circuit Schematic
Astable flip-flop with starter
A pair of non-zenered MOSPOWER transistors, a pair of LEDs and a simple RC circuit make an easy sequential flasher with almost "unlimited sequencing time�...
High drive oscillator-flasher – Circuit Schematic
High drive oscillator-flasher
The driver in the package is connected as a Schmitt trigger oscillator (A) where R1 and R2 are used to generate hysteresis. R3 and C are the inverting feedback ...
Low frequency oscillator-flasher – Circuit Schematic
Low frequency oscillator-flasher
Electrolytic capacitors are unnecessary to generate a 1 cps frequency. As an scs triggers on, the 0.2 µ¥ commutating capacitor turns off the other one and...
SCR relaxation flasher – Circuit Schematic
SCR relaxation flasher
Flashing occurs each time the capacitor discharges through the tumed-on SCR. When the discharge current falls below the SCR holding current, the SCR turns off, ...
Little dipper – Circuit Schematic
Little dipper
The circuit consists of two basic circuits, the oscillator and the detector. The oscillator uses an FET in a Colpitts configuration. The energy circulating in t...
Crystal tester – Circuit Schematic
Crystal tester
Transistor Ql, a 2N3563, and its associated components form an oscillator circuit that will oscillate if, and only if, a good crystal is connected to the test c...
High frequency signal generator – Circuit Schematic
High frequency signal generator
A tapped-coil Colpitis oscillator is used at Ql to provide four tuning ranges from 1.7 to 3.131Hz, 3.0 to 5.6 MHz, 5.0 to 12 MHz and 11.5 to 31 MHz. A Zener dio...
Oscillator operates from one cell – Circuit Schematic
Oscillator operates from one cell
The circuit is powered by a single 1.35 V mercury cell and provides a 1 V square-wave output. As shown, the crystal is a tuned circuit between transistors Ql an...
High-frequency crystal oscillator – Circuit Schematic
High-frequency crystal oscillator
A high speed oscillator is possible by combining an MECL 10 crystal oscillator with an MECL III frequency doubler as shown. One section of the MC10101 is conne...
Colpitis oscillator – Circuit Schematic
Colpitis oscillator
Bias for the pnp bipolar transistor is provided by resistor voltage divider network R1/R2. The collector of the oscillator transistor is kept at ac ground by ca...