Amplifier Circuit

RGB_VIDEO_AMPLIFIER

Published:2009/6/24 21:41:00 Author:May

This circuit is a three-channeL RGB video amplifer with individual brightness,black level and drive controls.   (View)

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DIFFERENTIAL_INPUT_INSTRUMENTATION_AMPLIFIER_WITH_HIGH_COMMON_MODE_REJECTION

Published:2009/6/24 21:45:00 Author:Jessie

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TRIPLE_OP_AMP_INSTRUMENTATION_AMPLIFIER

Published:2009/6/24 21:43:00 Author:Jessie

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INSTRUMENTATION_AMPLIFIER

Published:2009/6/24 21:42:00 Author:Jessie

Instrumentation amplifiers (differential amplifiers) are specifically designed to extract and amplify small differential signals from much larger common mode voltages. To serve as building blocks in instrumentation amplifiers, op amps must have very low offset voltage drift, high gain and wide bandwidth.The HA-4620/5604 is suited for this application. The optional circuitry makes use of the fourth amplifier section as a shield driver which enhances the ac common mode rejection by nullifying the effects of capac itance -to-ground mismatch between input conductors.   (View)

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THERMOCOUPLE_AMPLIFIER_WITH_COLD_JUNCTION_COMPENSATION

Published:2009/6/24 4:22:00 Author:May

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SIMPLE_AMPLIFIER_FOR_PHOTOTRANSISTORS

Published:2009/6/24 3:56:00 Author:May

This simple amplifier will work well with just about any phototransistor. The 741, although designed to operate with a split supply, will work with a single-sided supply as well.   (View)

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CRYSTAL_CHECKER

Published:2009/6/24 20:59:00 Author:Jessie

Use this circuit for checking fundamental HF crystals on a 'Go-No-Go' basis. An untuned Colpitts oscillator drives a voltage multiplier rectifier and a current amplifier. If the crystal oscillates, Q2 conducts and the LED lights. A3 or 6V, 40mA bulb could be substituted for the LED.   (View)

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RECEIVER_PREAMP

Published:2009/6/24 4:37:00 Author:May

Suitable for HF and VHF receivers, this preamplifier can be mounted on the back of the receiver for a boost in gain. Useful gain is about 17 dB at 50 MHz   (View)

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PRECISION_RTD_AMPLIFIER_CIRCUIT_FOR＋5_V

Published:2009/6/24 4:23:00 Author:May

This circuit uses a platinum resistance temperature device to sense temperature. It has a range of 0 to 300℃. The RTD bridge is driven with a regulated 200-μA current to minimize self heating of the RTD. A 5-V supply is used.   (View)

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TAPE_PLAUBACK_AMPLIFIER

Published:2009/6/24 3:57:00 Author:May

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MAGNETIC_PHONO_PREAMPLIFIER

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

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TAPE_RECORDING_AMPLIFIER

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

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TAPE_PREAMPLIFIER_NAB_EQUALIZATION

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

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FLAT_RESONSE_AMPLIFIER_FIXED_GAIN_CONFIGURATION

Published:2009/6/24 3:55:00 Author:Jessie

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PREAMPLIFIER_WITH_RIAA_NAB_COMPENSATION

Published:2009/6/24 3:54:00 Author:Jessie

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HIGH_GAIN_INVERTING_AC_AMPLIFIER

Published:2009/6/24 3:53:00 Author:Jessie

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ADJUSTABLE_GAIN_NONINVERTING_AMPLIFIER

Published:2009/6/24 3:53:00 Author:Jessie

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MAGNETIC_PICKUP_PHON0_PREAMPLIFIER

Published:2009/6/24 3:44:00 Author:May

This preamplifier provides proper loading to a reluctance phono cartridge. It provides approximately 35 dB of galn at 1 kHz (2.2 mV input for 100 mV output)．It features (S＋N)/N ratio of better than -70 dB (referenced to 10 mV input at 1 kHz) and has a dynamic range of 84 dB (referenced to 1 kHz). The feedback provides for RIAA equalization.   (View)

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PHONO_[REAM_RIAA_EQUALIZATION

Published:2009/6/24 3:52:00 Author:Jessie

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TELEPHONE_BELL_AMPLIFIER

Published:2009/6/24 3:43:00 Author:May

Telephone bell amplifier circuit will let you hear (or see) an enhanced alarm if you are away from your telephone.   (View)

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