REMOTE_AMPLIFIER

Published:2009/6/24 3:51:00 Author:Jessie

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TELEPHONE_RING_AMPLIFIER

Published:2009/6/24 3:41:00 Author:May

This circuit takes its operating power from the telephone line BZ1 is a piezoelectric transducer.   (View)

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TRANSFORME_RLESS_BALANCE_INPUTS_MICROPHONE_PREAMP

Published:2009/6/24 3:39:00 Author:May

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ONE_SHOT_MULTIVIBRATOR

Published:2009/6/24 3:49:00 Author:Jessie

An LM139 section can be used as a one shot   (View)

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LM382_PHONO_PREAMPLIFIER_RIAA

Published:2009/6/24 3:47:00 Author:Jessie

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ULTRA_HIGH_GAIN_AUDIO_AMPLIFIER

Published:2009/6/24 3:33:00 Author:May

Sometimes called the JFET μt-amp, this circuit provides a very low power, high gain amplifying function. Since pt of a JFET in-creases as drain current decreases, the lower drain current is, the more gain you get. Input dynamic range is sacrificed with increasing gain, however.   (View)

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TRANSDUCER_AMPLIFIER

Published:2009/6/24 3:31:00 Author:May

This circuit is high-input-impedance acamplifier for a piezoelectric transducer. Input resistance is 880 M, and again of 10 isobtained.   (View)

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ELECTRONIC_BALANCED_INPUT_MICROPHONE_AMPLIFIER

Published:2009/6/24 3:30:00 Author:May

It is possible to simulate the balanced per-formance of a transformer electronically with a different amplifier. By adjusting the presets, the resistor ratio can be balanced so that the best CMRR is obtained. It is possible to get a better CMRR than from a transformer. Use a RC4136 which is a quad low noise op amp.   (View)

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BASIC_TRANSISTOR_AMPLIFIER_CIRCUITS

Published:2009/6/24 3:29:00 Author:May

Typical component values are given for use at audio frequencies, where these circuits are used most often. The input and output phase relationships are shown.   (View)

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TRANSFORMERLESS_MICROPHONE_PREAMPS_UNBALANCED_INPUTS

Published:2009/6/24 3:40:00 Author:Jessie

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GENERAL_PURPOSE_PREAMPLIFIER

Published:2009/6/24 3:28:00 Author:May

Not much can be said about how the LM382 works as most of the circuitry is contained within the IC. Most of the frequency-determining components are on the chip-only the capacitors are mounted externally. The LM382 has the convenient characteristic of rejecting ripple on the supply line by about 100 dB, thus greatly reducing the quality requirment for the power supply.   (View)

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ASTABLE_MULTIVIBRATOR_WITH_STARTING_NETWORK

Published:2009/6/24 3:35:00 Author:Jessie

This circuit will start with a slowly rising supply voltage waveform.   (View)

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MICROPHONE_AMPLIFIER

Published:2009/6/24 3:34:00 Author:Jessie

This circuit operates a 1.5 Vdc from source.   (View)

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HIGH_SLEW_RATE_POWER_OP_AMP_AUDIO_AMP

Published:2009/6/24 3:24:00 Author:May

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RADON_MONITOR_AMPLIFIER_AND_HEAD

Published:2009/6/24 3:27:00 Author:Jessie

A positively charged anode wire attracts electrons and a negatively charged cathode attracts positively charged ions. The recombination of electrons and ions causes a current that produces a voltage pulse. The cathode is maintained at -500 V by a charge on the 0.1-μF capacitor.A beverage can forms the chamber, an aluminum can forms the cathode, and half cans form protective end covers. The amplifier circuit board is shown to the left of center.   (View)

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16_W_BRIDGE_AMPLIFIER

Published:2009/6/24 3:25:00 Author:Jessie

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PHONO_AMPLIFIER

Published:2009/6/24 3:22:00 Author:May

Used when maximum input impedanceis required or the signal attenuation of the voltage divider volume controlis undesirable.   (View)

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BRIDGE_AUDIO_POWER_AMPLIFIER

Published:2009/6/24 3:21:00 Author:May

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INVERTING_UNITY_GAIN_AMPLIFIER

Published:2009/6/24 3:19:00 Author:May

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SINGLE_OP_AMP_FULL_WAVE_RECTIFIER

Published:2009/6/24 3:19:00 Author:May

This circuit operates from +5 V and uses a single op amp to deliver a full-wave rectified output of the input signal.   (View)

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