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(11) | EP 0 602 722 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Hold circuit, mobile station, base station and digital radio communication system comprising such a hold circuit |
(57) In a system for digital radio communication (20) with dynamic channel allocation,
the maximum signal strength (Umax) is measured in a time slot (TS). For this purpose, the peak value is to be held.
This may be effected in the receive section of both a base station (21) and a mobile
station (22). An example of such a digital radio communication system (20) is a system
operating according to the DECT standard. A hold circuit (1) is known which holds
the peak value of an analog input signal (Ui) in analog form. It is an object of this invention to hold the peak value in digital
form. To this end the hold circuit (1) comprises in the feedback loop (2) a digital
hold element (8) and a digital/analog converter (11) for feeding back the output signal
(U₀) to the comparator element (3). In an exemplary embodiment the digital hold element
(8) is a counter (13). The invention likewise relates to a hold circuit (1) which
holds the minimum value of the input signal (Ui). |