Circuit for measuring electric field by rapid measurement and no

Details Circuit for measuring electric field by rapid measurement and no Circuit for measuring electric field by rapid measurement and no

1995-11-01

1997-04-15

Chin, Stephen

Pulse or digital communications

Testing

375344, 4552262, 455260, H04B 346, H04B 1700, H04L 2706

Patent

active

056217579

ABSTRACT:
An apparatus for measuring an electric field of an incoming signal implemented in a mobile communication system is disclosed. The apparatus comprises heterodyne receiver for heterodyning the incoming signal with a local signal to detect electric field information of the incoming signal, a local oscillator provided with phase-locked loop circuit, wherein the local oscillator produces a local signal through the phase-locked loop when receiving a first selection signal, and the local oscillator, when receiving a second signal, produces a local signal having a frequency which varies in accordance with a prescribed voltage change, and a controller which provides a first selection signal to the local oscillator when a normal measurement of the electric field is to be effected and provides a second selection signal to the local oscillator when a rapid measurement of the electric field is required.

REFERENCES:
patent: 5203030 (1993-04-01), Kawasaki
patent: 5396521 (1995-03-01), Minami
patent: 5402446 (1995-03-01), Minami

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