Type K Thermocouple Amplifier And Cold Junction Compensator

The output conditions of a Type K thermocouple, while providing cold-junction compensation, operating over temperatures between 0’C and 250’C is shown in circuit diagram below. This circuit has been designed to produce a basic output voltage transfer characteristic of 10mV/’C and operates from single +3.3V to +5.5V supplies with the AD8551. A Type K thermocouple exhibits a Seebeck coefficient of […]

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Temperature Sensor Current Loop Transmitter

LM134 makes a good temperature sensor because it has a highly linear output characteristic. Because it is a current output device and is therefore not affected by long wire runs, LM134 is particularly useful in remote sensing applications. LM134 is easy to calibrate. It has good long term stability and can be interfaced directly with most data acquisition system, so […]

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The Full-Wave Rectifier and Averaging Filter

The heart of an average reading, rms calibrated AC voltmeter is shown in figure below. It’s a rectifier and averaging filter. We can remove the averaging function and provide a precision full-wave rectifier by deleting C2 and provide an absolute value generator by deleting C1. By following the signal path for negative and then for positive input, circuit operation may […]

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Capacitive Discharge Ignition (CDI)

Mopeds or lawn movers ignition system design is based exclusively on CDI (1) in the world of small motor. CDI was in the past only used in the replacement module market in auto mobile. Today, the CDI system is becoming one of the most efficient choice available due to new standards of pollution control. The same application circuit using both […]

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