公开(公告)号：EP0474710A1

公开(公告)日：1992-03-18

申请号：EP90908468.0

申请日：1990-06-04

申请人： H. u. C. Elektronik GmbH

发明人： HANSEN, Jens

IPC分类号： H04L29 ,  H03M5 ,  H04L23 ,  H04L25

CPC分类号： H04L23/02 ,  H03M5/145 ,  H04L25/49

摘要： Selon un procédé de transmission ou de mémorisation analogique d'informations numériques, les informations numériques sont superposées à un train complet d'oscillations formé par la superposition cumulative de plusieurs trains partiels d'oscillations à bande étroite. Les informations numériques sont décomposées en informations partielles contenant chacune plusieurs bits de données, et une valeur d'amplitude tirée d'une réserve de valeurs d'amplitude contenant une pluralité de degrés d'amplitude est superposée à chaque train partiel d'oscillations en fonction des bits de données des informations partielles. L'invention concerne également un circuit de mise en oeuvre de ce procédé.

公开(公告)号：EP0474710B1

公开(公告)日：1994-04-13

申请号：EP90908468.3

申请日：1990-06-04

申请人： H. u. C. Elektronik GmbH

发明人： HANSEN, Jens

IPC分类号： H04L23/02 ,  H04L25/48 ,  H03M5/14

CPC分类号： H04L23/02 ,  H03M5/145 ,  H04L25/49

摘要： In a process for analog transmission or storage of digital data, the digital data are imposed on a total train of oscillations produced by the cumulative superposition of several narrow-band partial trains of oscillations. The digital data are decomposed into partial data each containing several data bits and an amplitude value from a store of values containing a number of amplitude steps is imposed on each partial train of oscillations in function of the data bits of the partial data. The invention also concerns a circuit for carrying out this process.

公开(公告)号：EP0258332B1

公开(公告)日：1992-06-24

申请号：EP87901353.0

申请日：1987-02-23

申请人： H. u. C. Elektronik GmbH

发明人： HANSEN, Jens

IPC分类号： H03D3/00

CPC分类号： H03D3/005

摘要： Method and circuit for converting, through at least one intermediary frequency, frequency modulated signals into low frequency signals. The intermediary frequency signals are produced by mixing (2) with an oscillator voltage (3) and they are filtered by means of filters (5) and demodulated (6). The resonance frequency of the filter(s) is restituted by means of a control voltage derived from the demodulated signal as a function of the intermediary frequency. To improve the restitution capacity of the filter, the oscillator (3) is so driven as to produce an amplitude drop in the high range of low frequencies. The control voltage intended to the oscillator is also derived from the demodulated low frequency signal while there is provided a phase rotation with an inverter (8) connected in the control circuit of the oscillator.

公开(公告)号：EP0198862B1

公开(公告)日：1992-01-15

申请号：EP85905057.7

申请日：1985-10-11

申请人： H. u. C. Elektronik GmbH

发明人： HANSEN, Jens

IPC分类号： H03D3/00

CPC分类号： H03D3/005

摘要： The intermediate-frequency signals are produced by mixing (3) with an oscillator voltage (4), whereby they are filtered by filters (5) and demodulated (7). The oscillator voltage or the resonance frequency of the filter or filters are followed-up by a control voltage derived from the demodulated signal corresponding to the intermediate frequency. The perturbatory phase modulation occurring as a result of the control lag is compensated by opposite-phase phase-modulation (2), which is superposed on the intermediate frequency. In this, the phase modulation is achieved by a phase modulator (2) which is connected with the output of a demodulator (7) by a matching circuit (9). Another possibility for achieving phase modulation of the intermediate frequency is to modulate the oscillator of the mixing stage.