Title:
TRANSMISSION CONFIGURATION FOR TRANSMITTING SIGNALS AND D/A CONVERTER CIRCUITS THEREFOR
Document Type and Number:
WIPO Patent Application WO2004051860
Kind Code:
A3
Abstract:
The invention relates to a transmission configuration for transmitting signals, particularly measurement or control signals in analog form, comprising a direct current (DC) D/A converter circuit (12') for a DC useful signal. Said D/A converter circuit contains an input memory, e.g. a register (23), a digital modulator, particularly a sigma-delta modulator (57) and an analog low-pass (25'). The transmission configuration also comprises an alternating current (AC) D/A converter circuit (13') for a modulated AC modem signal that contains a digital pulse-width modulator (62) and an analog filter (33'). In the DC D/A converter circuit (12'), a digital low-pass filter (47) is assigned to the digital modulator and in the AC D/A converter circuit (13'), an analog adder (63) is connected down from the pulse-width modulator (62) that converts the modem signal into a 1 bit signal. Another signal to be added, e.g. a direct current signal that is activated during the quiescent state, an MSB signal or a clock signal, is fed to said analog adder.
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Inventors:
SCHINDLER VOLKER (AT)
Application Number:
PCT/AT2003/000355
Publication Date:
September 02, 2004
Filing Date:
November 27, 2003
Export Citation:
Assignee:
SCHINDLER VOLKER (AT)
International Classes:
H03M1/68; H03M1/82; H03M3/00; (IPC1-7): H03M3/00; G08C19/02; H03M1/82
Foreign References:
| US6249237B1 | 2001-06-19 | |||
| US5208594A | 1993-05-04 | |||
| US5245333A | 1993-09-14 | |||
| US6317067B1 | 2001-11-13 | |||
| US5406284A | 1995-04-11 | |||
| EP1244219A2 | 2002-09-25 |
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