Pradhan, Parth (2009) *Design Sign of Delta Sigma Wattmeter.* BTech thesis.

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## Abstract

Instantaneous power in a load is measured by multiplying the voltage across it by the current flowing through it. The multiplication is achieved in a delta sigma wattmeter by using two samplers rather than a multiplier. Sampling and multiplication are closely related. For example, double side-band suppressed carrier modulation can be produced by either multiplying an analogue signal with a sinusoidal carrier, or by sampling the analogue signal with a binary pulse train and filtering these samples. Alternatively these samples can be produced without a sampler if a multiplier is used. This is achieved by multiplying pulse train, whose binary values are arranged to be zero or unity, with the analogue signal.

The delta-sigma wattmeter is given this name because the voltage developed across the load in which the power is to be measured is encoded by a delta sigma modulator, d.s.m into a binary waveform. The d.s.m. decoder is just a low-pass filter

Item Type: | Thesis (BTech) |
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Uncontrolled Keywords: | wattmeter, delta-sigma modulation, delta-sigma wattmeter, delta modulation |

Subjects: | Engineering and Technology > Instrumentation |

Divisions: | Engineering and Technology > Department of Electronics and Communication Engineering |

ID Code: | 208 |

Deposited By: | Mr. Parth Pradhan |

Deposited On: | 11 May 2009 10:25 |

Last Modified: | 11 May 2009 10:25 |

Related URLs: | |

Supervisor(s): | Mahapatra, K K |

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