(19)
(11) EP 0 602 722 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.10.1994 Bulletin 1994/43

(43) Date of publication A2:
22.06.1994 Bulletin 1994/25

(21) Application number: 93203453.1

(22) Date of filing: 09.12.1993
(51) International Patent Classification (IPC)5: H04B 7/005, G01R 19/04
(84) Designated Contracting States:
CH DE FR GB LI

(30) Priority: 14.12.1992 EP 92203889

(71) Applicants:
  • PHILIPS ELECTRONICS N.V.
    5621 BA Eindhoven (NL)

    DE FR GB 
  • FASELEC A.G.
    CH-8845 Zürich (CH)

    CH LI 

(72) Inventor:
  • Gradenwitz, Paul Georg Melchior
    NL-5656 AA Eindhoven (NL)

(74) Representative: De Jongh, Cornelis Dominicus et al
INTERNATIONAAL OCTROOIBUREAU B.V., Prof. Holstlaan 6
5656 AA Eindhoven
5656 AA Eindhoven (NL)


(56) References cited: : 
   
       


    (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).






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