Circuit Diagram

SUPPLY_OVERLOAD_AND_REVERSE_POLARITY_PROTECTION

Published:2009/7/21 10:03:00 Author:Jessie

Uses signal from Q1 to trigger SCR1, which turns off series-pass transistor when overload reaches 15 amp. Will also provide limiting of output voltage at 25 V, input overvoltage protection at 32 V, and input reverse-polarity protection by CRL. -J. J. Rado, Versatile SCR Protection for Power Supplies, EEE, 13:8, p 56-62.   (View)

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FOUR_STAGE_PNPN_BINARY_COUNTER

Published:2009/7/21 9:21:00 Author:Jessie

Operates on negative trigger pulses, to provide 16:1 division.-J. B. Hangsfefer and L. H. Dixon, Jr., Triggered Bistable Semiconductor Circuits, Electronics, 32:35, p 58-60.   (View)

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ADJUSTABLE_SCHMITT_TRIGGER

Published:2009/7/21 9:21:00 Author:Jessie

Accepts either sine waves or pulses. Adjustable input level control allows trigger to occur on any desired portion of input waveform. Amplifier stage drives flip-flop of units decade counter directly.-R. W. Wolfe, Decode Decimal Counter Speeds Printed Readout, Electronics, 31;3, p 88-90.   (View)

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BLOCKING_OSCILLATOR_TRIGGER_GENERATOR

Published:2009/7/21 9:20:00 Author:Jessie

Generates relatively narrow pulses at adjustable repetition rate. Audio transformer provides positive feedback.-H. L. Armstrong, Transistorized Trigger and Delay Generators, Electronics, 313, p 96-98.   (View)

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COMBINATION_SCHMITT_MONOSTABLE

Published:2009/7/21 9:20:00 Author:Jessie

Three transistors in complementary connection give Schmitt trigger (Q1-Q2) und mono-stable mvbr (Q2-Q3) in which triggering level is accurately controlled. Output pulse width is independent of input because circuit is regenerative.-G. Marosi, Combination Schmitt Trigger-Monostable Multivibrator, EEE, 13:10, p 77.   (View)

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COLLECTOR_TRIGGERING_WITH_TRIG0ER_AM_PLIFIER

Published:2009/7/21 9:19:00 Author:Jessie

Used in early stages of counter to increase speed, while permitting automatic assembly in all stages. For 1-Mc trigger rate, less than 1 v of positive trigger amplitude is needed.- Transistor Manual, Seventh Edition, General Electric Co., 1964, p 198.   (View)

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RANDOM_PULSE_DETECTOR

Published:2009/7/21 9:18:00 Author:Jessie

Either positive or negative pulses above predetermined minimum amplitude force Q1 into saturation and turn Q2 off, causing the meter to deflect immediately. Circuit may also be used as pulse stretcher or threshold detector.-C. F. Johnson and J. T. Loiselle, Bipolar Pulse Detector Features Meter Display, Electronics, 38:24, p 63.   (View)

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PULSE_GENERATOR

Published:2009/7/21 9:17:00 Author:Jessie

Delivers 1-amp peak out put current having duration of 10 microsec when pnpn unit is triggered on by low-level positive pulse applied to its base.-J. B. Hangstefer and L. H. Dixon, Jr., Triggered Bistable Semiconductor Circuits, Electronics, 32:35, p 58-60.   (View)

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HOURS_OF_DELAY

Published:2009/7/21 9:16:00 Author:Jessie

Capacitor starts charging from -12 v to +12 v when switch is opened.Diode begins conducting at ground potential, and operational trigger trips when diode passes 2 na. Timing accuracy is high.-P. Lefferts, Operational Trigger For Precise Control, Electronics, 37:28, p 50-55.   (View)

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SATURATED_TRANSISTOR_MEASUREMENT

Published:2009/7/21 9:16:00 Author:Jessie

Transistor under lest is biased to saturate collector to within 100 my of ground for 10-ma collector load. Operational trigger then trips when Vx is 1 mv above 100 my.-P. Lefferts, Operational Trigger For Precise Control,Electronics,37:28,p 50-55.   (View)

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VARIABLE_HYSTERESIS_SCHMITT

Published:2009/7/21 9:15:00 Author:Jessie

R7 adjusts lower trigger point, and R8 adjusts upper trigger point.-R. S. Hughes, Variable-Hysteresis Schmitt Trigger, EEE, 13:7, p 41.   (View)

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BASE_TRIGGERED_FLIP_FLOP

Published:2009/7/21 9:14:00 Author:Jessie

Maximum trigger rate for steering circuit exceeds 5 Mc with negative trigger pulse amplitude from 0.75 to 2 v. Requires less trigger energy than collector triggering but more accurately controlled trigger amplitude.- Transistor Manual, Seventh Edition, General Electric Co., 1964, p 197.   (View)

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SENSE_AMPLIFIER

Published:2009/7/21 9:13:00 Author:Jessie

Blocking-oscillator transistor amplifier is triggered by output of diode bridge network. Rectification assures that readout voltages of both polarities are sensed.Diodes attenuate small signals greatly relative to large signals, increasing signal-noise ratio at rectifier output to about 20:1.-C. S. Warren, W. G. Rumble, and W. A. Helbig, Transistorized Memory Monitors Earth Satellite, Electronics, 31:3, p 66-70.   (View)

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LC_PULSE_GENERATOR

Published:2009/7/21 9:12:00 Author:Jessie

Provides half-sinusoid output determined by L and C, when pnpn unit is triggered on by low-level positive pulse applied to its base.-J. B. Hangstefet and L. H. Dixon, Jr., Triggered Bistable Semiconductor Circuits, Electronics, 32:35, p 58-60.   (View)

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HIGH_IMPEDANCE_SCHMITT

Published:2009/7/21 9:12:00 Author:Jessie

Use of let Q1 for input stage gives high input impedance, as required for threshold detector circuit. Output pulse is square wave at up to 100 kc triggering. Turnoff threshold is about 0.2 v below turnon.-L. R. Lott, FET Increases Schmitt Trigger Input Impedance, Electronics, 38:15, p 65.   (View)

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REGENERATIVE_SWITCHING_TRIGGER

Published:2009/7/21 9:11:00 Author:Jessie

Advantages over conventional Schmitt include reduced power consumption (neither transistor conducts during off state), full range output voltage swing, and low output Impedance. Some input signal appears in output. Rise and fall times are 0.15 microsec.-R. K. Vieth, Trigger Circuit Gives Less P-diss, More V-out, EEE, 11:12,p 28.   (View)

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VOLTAGE_MONITOR

Published:2009/7/21 9:09:00 Author:Jessie

Input voltage sensitivity better than 0.7 mv is obtained from operational trigger.-P. Lelferts, Operational Trigger For Precise Control, Electronics, 37:28, p 50-55.   (View)

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DELAYED_TRIGGER_GENERATOR

Published:2009/7/21 9:08:00 Author:Jessie

Provides controllable positive or negative delayed trigger. When used to see leading edge of multivibrator pulse on cro, trigger starts cro sweep and delay generator. After preset time, delay generator produces pulse used to trigger mvbn-H. L. Armstrong, Transistorized Trigger and Delay Generators, Electronics, 31:3, p 96-98.   (View)

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NONCUTOFF_SCHMITT

Published:2009/7/21 9:07:00 Author:Jessie

Both amplifiers are always connected to their current sources, hence are never cut off and can operate in optimum region, with no risk of damage by inverse base-emitter voltage. Output voltage alternates between two levels.-H. Inose, Y, Yoshida, and H. Tada, Noncutoff Circuits Improve Trigger Switching, Electronics, 35:30, p 36-39.   (View)

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PNPN_FLIP_FLOP_BINARY_COUNTER

Published:2009/7/21 9:06:00 Author:Jessie

Negative trigger pulses produce 2:1 operation. Con be driven from identical flip-flop or from collector of npn silicon transistor.-J. B. Hang-stefer and L. H. Dixon, Jr., Triggered Bistable Semiconductor Circuits, Electronics, 32:35, p 58-60.   (View)

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