Amplifier Circuit

60_CPS_BANDSTOP_AMPLIFIER

Published:2009/7/10 5:05:00 Author:May

With fet as output buffer to give near-infinite load impedance, twin,T notch filter gives up to 50 db attenuafion at notch frequency.-FET's and RC Networks (Siliconix ad), Electronics, 39:4, p 71.   (View)

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HIGH_INPUT_IMPEDANCE_A_C_AMPLIFIER

Published:2009/7/10 5:05:00 Author:May

Gives input impedance of 30 meg without sacrificing bandwidth or noise performance.Voltage gain is 40 db, Technique involves bootstrapping fet Q1 and using fixed bias for its gate. Q2 is operoted grounded-base to reduce Miller capacitance of field effect at high frequencies.-Texus Instruments Inc., Transistor Circuit Design, McGraw-Hill,N.Y.,1963, p 520.   (View)

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445_KC_TUNNEL_DIODE_AMPLIFIER

Published:2009/7/10 5:02:00 Author:May

Has approximately 20 db gain.-I. A. Lesk, N. Ho-Ionyak, Jr, and u. s. Dovidsohn, The Tunnel Diode-Circuits and Applicalions, Electronics,32:48,p 60－64.   (View)

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65_CPS_AMPLIFIER

Published:2009/7/10 5:01:00 Author:May

Consists of three triode stages (V2A, V2B, and V3A). Peaks at about 6.5 cps, with 18 db attenuation at each octave. Double-T reiection filter between V2A and V2B ottenuates any 60-cps pickup. Overall gain is 80 db. Phase inverter V3B provides 180° out-of-phase signal for full-wave phose-sensitive bridge rectifier that uses reference signal.Output is rectified error signal for infrared analyzer used to detect leaks in automobile air-suspension systems.-P. G.Balko, Infrared Finds Auto Suspension Leaks, Electtonics, 31:49, p 82-85.   (View)

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ISOLATION_AMPLIFIER_1

Published:2009/7/10 4:59:00 Author:May

Effective gain stability factor is approximately equal to reciprocal of product of omplification factors of two halves of tube. Gives high transmission accuracy, with high input impedance.-G. M. Davidson and R. F. Brady, Unity-Gain Ampliler Offers High Stcability, Electronics, 33:9, p 66-67.   (View)

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ISOLATION_AMPLIFIER

Published:2009/7/10 4:58:00 Author:May

Gain stability and input impedance are much better than conventional cathode follower. Feedback capacitor goes between triode grids, but may also go between grid of V1B and cathode of V1A.-G. M. Davidson and R. F. Brady, Unity-Gain Amplifier Offers High Stability, Electronics, 33:9, p 66-67.   (View)

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SOLAR_CELL_AMPLIFIER

Published:2009/7/10 4:57:00 Author:May

Used with mulliaperture solar cells to genorate 10 strobe pulses.Eight circuits with cells one needed to generate 80 strobe pulses for reading conventional punched card.-C. R. Hearn,Multi-Aperture Solar Cell Amplifiter,EEE,14:4,p 43－44.   (View)

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CASCADED_741_OPAMPS

Published:2009/7/10 4:51:00 Author:May

Two opamps in series provide 80 dB of audio gain with bandwidth of about 300 to 6000 Hz. Gain of each opamp is set at 100. With three stages, bandwidth would be 5100 Hz. Output will drive loudspeaker at comfortable room level, if fed through 1-μF nonpolarized capacitor to output transformer having 500-ohm primaryand 8-ohm secondary.-C.Hall, Circuit Design with the 741 Op Amp, Ham Radio, April 1976, p 26-29.   (View)

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Sample_and_hold_circuit_used_to_automatically_zero_a_high_gain_amplifier

Published:2009/7/19 20:13:00 Author:Jessie

Sample-and-hold circuit used to automatically zero a high-gain amplifier (courtesy Analog Devices, Inc.).   (View)

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Notch_filter_using_an_ECG947_dual_operational_amplifier_as_a_gyrator

Published:2009/7/19 20:10:00 Author:Jessie

Notch filter using an ECG947 dual operational amplifier as a gyrator. The ECG947 is short-circuit protected and requires no external components for frequency compensation (courtesy GTE Sylvania Incorporated).   (View)

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A_F_AMPLIFIER_WITH_SQUELCH_2

Published:2009/7/17 22:40:00 Author:Jessie

Used to make first audio stage inoperative during no-signal condition in communication receiver.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N12-2.   (View)

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A_F_AMPLIFIER_WITH_SQUELCH_1

Published:2009/7/17 22:39:00 Author:Jessie

Input is obained from noise rectifier and amplifier of communication receiver. Squelch is used to make first audio stage inoperative during no-signal condition.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol, 1, Electron Tube Circuits, 1963, p N12-2.   (View)

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A_F_AMPLIFIER_WITH_SQUELCH

Published:2009/7/17 22:20:00 Author:Jessie

Used to make first audio stage inoperative during no-signal condition in communication receiver.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N12-2.   (View)

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Voltage_follower_using_an_ECG915_operational_amplifier

Published:2009/7/19 21:39:00 Author:Jessie

Voltage follower using an ECG915 operational amplifier. Output is taken on pin 6 (courtesy GTE Sylvania Incorporated).   (View)

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Inverting_unity_gain_high_slew_rate_circuit_using_an_ECG915_operational_amplifier_

Published:2009/7/19 21:38:00 Author:Jessie

Inverting unity-gain high-slew-rate circuit using an ECG915 operational amplifier (courtesy GTE Sylvania Incorporated).   (View)

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Noninverting_op_amp_using_an_AD510_8_pin_TO99_

Published:2009/7/19 21:38:00 Author:Jessie

Noninverting op amp using an AD510 8-pin TO99 (courtesy Analog Devices, Inc.).   (View)

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Inverting_amplifier_using_half_of_an_ECG947_dual_operational_amplifier

Published:2009/7/19 21:37:00 Author:Jessie

Inverting amplifier using half of an ECG947 dual operational amplifier. The ECG947 is short-circuit protected and requires no external components for frequency compensation (courtesy GTE Sylvania Incorporated).   (View)

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Op_amp_in_closed_loop_frequency_compensated_configuration_

Published:2009/7/19 21:36:00 Author:Jessie

Op amp in closed-loop frequency-compensated configuration (courtesy Motorola Semiconductor Products Inc.).   (View)

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Compressor_expander_amplifiers_using_an_ECG947_dual_operational_amplifier

Published:2009/7/19 21:35:00 Author:Jessie

Compressor/expander amplifiers using an ECG947 dual operational amplifier. The ECG947 is short-circuit protected and requires no external components for frequency compensation (courtesy GTE Sylvania Incorporated).   (View)

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Single_pole_frequency_compensation_circuit_using_an_AD101A_201A_301A_op_amp

Published:2009/7/19 21:34:00 Author:Jessie

Single pole frequency compensation circuit using an AD101A/201A/301A op amp. Typical supply voltage is ±15volts. Voltage gain is 88 dB (courtesy Analog Devices, Inc.).   (View)

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