Amplifier Circuit

IHREE_FET_A_C_AMPLIFIER

Published:2009/7/10 5:29:00 Author:May

Can be used in applications requiring amplilcation of microvolt signals, as in ultrasensitive preamps for null detectors, medical research equipment, recorders, osciloscopes, and low-level transducers. With 100K generator resistance, amplifier 3-db bandwidth is 1 cps to 40 kc.-L.J. Sevin, Jr., Field-Effect Transislors, McGraw-Hill, N.Y., 1965, p 107.   (View)

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Norton_low_drift_ramp_and_hold

Published:2009/7/17 4:59:00 Author:Jessie

This circuit uses two sections of an LM3900 to form a low-drift ramp-and-hold circuit with a zero-drift adjustment. If both inputs are at zero volts, the circuit is in hold (after proper zero-drift adjustment). Raising either input causes the dc output to ramp up or down, depending on which input goes positive. The ramp slope is a function of the input-voltage magnitude. Additional inputs can be placed in parallel to increase the input-control variables. National Semiconductor, Linear Applications Handbook 1991 p 249   (View)

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Norton_difference_integrator

Published:2009/7/17 4:58:00 Author:Jessie

This circuit shows one section of an LM3900 that is used to form a difference integrator. In addition to being the basis for many sweep circuits, this circuit can also provide the time integral of the difference between two input waveforms. This is useful for dc feedback loops because both the comparison to a reference and the integration occur in one amplifier. National Semiconductor linear Applications Handbook 1991 p 248   (View)

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Norton_differentiator

Published:2009/7/17 4:58:00 Author:Jessie

This circuit shows one section of an LM3900 that is used to form a differentiator. Notice that the differentiated output is one-half of the square-wave input. National Semiconductor, Linear Applications Handbook, 1991, p 248   (View)

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Norton_direct_coupled_amplifier_with_±15_V_supplies

Published:2009/7/17 4:52:00 Author:Jessie

This circuit uses one section of an LM3900 to form a direct-coupled inverting amplifier. The ±15-V supplies must have complementary tracking, and R4 adjust for proper offset (or zero offset) at the output. National semiconductor, Linear Applications Handbook 1991 p 246   (View)

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Norton_ac_amplifier_with_±15__V_supplies

Published:2009/7/17 4:51:00 Author:Jessie

This circuit uses one section of an LM3900 to form an ac-coupled amplifier, where both inputs bias at one VBE above the -VEE voltage (about -15 V). With RF=RB, VO will bias at about 0 V to allow a maximum output swing.Because pin 7 is common to all four amplifiers in the package, the other amplifiers are also biased for operation with ±15-V supplies. National Semiconductor Linear Applications Handbook 1991, p 246   (View)

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Norton_Schmitt_triggers

Published:2009/7/17 4:49:00 Author:Jessie

This circuit uses one section of an LM3900 connected to form a Schmitt trigger. Both inverting and noninverting versions are shown. By adjusting the values of RB, RF, and /RIN, the switching values of VIN can be set to any desired levels. National Semiconductor Linear Applications Handbook 1991 p 244   (View)

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173_MC_POWER_AMPLIFIER

Published:2009/7/10 5:28:00 Author:May

Uses two 2N-1141's in parttllel to deliver average of 400 mw, with power gain of 11.5 db and collector efficiency of 42%. Has excellent large signal performance.-Texas Instruments Inc., Solid-State Communications, McGraw.Hill, N.Y., 1966, p 320.   (View)

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WIDEBAND_AMPLIFIER

Published:2009/7/10 5:24:00 Author:May

Twin.T ampliler is used between crystal detector and cro of microwave spectrometer for studying electron resonance phenomenon in pctramagnetic materials.-R. R. Unterberger, Microwave Spectrometer Tests Electron Resonance, Elecronics, 32:11, p 142-144.   (View)

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025_W_AMPLIFIER

Published:2009/7/10 5:23:00 Author:May

Single Radio Shack RS386 IC powered by 6－9 V from battery provides gain of about 200 with sufficient power to drive 8-ohm loudspeaker when speaking closely into small dynamic microphone of type used with portable tape recorders.-F. M. Mints, Integrated Circuit Projects, Vol. 2, Radio Shack, Fort Worth, TX, 1977, 2nd Ed., p 87-95.   (View)

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Weighted_averaging_amplifier_using_half_of_an_ECG947_dual_operational_amplifier

Published:2009/7/19 21:06:00 Author:Jessie

Weighted averaging 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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Differential_amplifier_with_low_noise_output_using_an_MC1539_op_amp_

Published:2009/7/19 21:05:00 Author:Jessie

Differential amplifier with low-noise output using an MC1539 op amp (courtesy Motorola Semiconductor Inc.).   (View)

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BOOTSTRAPPED_FET_SOURCE_FOLLOWER

Published:2009/7/10 5:18:00 Author:May

Gives 6 db gain for high-impedance transducer output, when 5-meg gate bias resistor is bootstrapped to the source through 100-mfd electrolytic.-L. J. Sevin, Jr., Field-Effect Trclnsislors, Mc Graw-Hill, N.Y., 1965, p 67.   (View)

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Unity_gain_op_amp_with_fast_response_time

Published:2009/7/19 21:05:00 Author:Jessie

Unity-gain op amp with fast response time(courtesy Motorola Semiconductor Products Inc.).   (View)

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Voltage_comparator_using_an_MC1539G_op_amp

Published:2009/7/19 21:04:00 Author:Jessie

Voltage comparator using an MC1539G op amp (courtesy Motorola Serniconductor Products Inc.).   (View)

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High_impedance_high_gain_inverting_amplifier

Published:2009/7/19 21:03:00 Author:Jessie

Typical supply voltages are +15 volts and -15 volts (courtesy GTE Sylvania Incorporated).   (View)

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Frequency_compensation_circuit_using_an_ECG915_operational_amplifier

Published:2009/7/19 21:03:00 Author:Jessie

Frequency compensation circuit using an ECG915 operational amplifier. See table for component values. Supply voltage is±15 volts (courtesy GTE Sylvania Incorporated).   (View)

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DIRECT_COUPLED_AF

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

Combination of unipoiar and bipolar transistors gives desirable am plifying features of each solid-state device. Can be used as speech amplifier and for other low-level audio applications.-I. M. Gottlieb, A New Look at Solid-State Amplifiers, Ham Radio, Feb.1976, p 16-19.   (View)

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High_impedance_input_high_current_output_voltage_follower

Published:2009/7/19 21:02:00 Author:Jessie

High-impedance input, high-current output voltage follower (courtesy Motorala Semiconduntor Products Inc.).   (View)

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High_slew_rate_Power_amplifier_using_an_ECG941_941D_941M_operational_amplifier_

Published:2009/7/19 21:01:00 Author:Jessie

High-slew-rate Power amplifier using an ECG941/941D/941M operational amplifier (courtesy GTE Sylvania Incorporated).   (View)

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