Title:
DIGITAL-ANALOG SECONDARY CONVERTER
Document Type and Number:
Japanese Patent JPH08335880
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high-speed processable secondary digital/analog converter(DACQ) which does not increase current consumption but rather decreases current consumption. SOLUTION: A DACQ composed of a pair of serially connected 1st and 2nd linear converter (DAC) has direct coupling between the output node of 1st DAC 1 and the R-2R type resistor circuit network of 2nd DAC 2, corresponding to the LSB step of R-2R type resistor circuit. A high impedance node, especially the input node of 2nd DAC is appropriately removed from a current path, so as to significantly reduce the problem of comparatively long settling time at the high impedance node (having a related originally large parasitic capacitance). The circuit is markedly simplified by the special architecture of this DACQ.
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Inventors:
MERUKIOORE BURUTSUKORERI
MARUKO DEMICHIERI
JIYUSETSUPE PATSUTEI
BUARERIO PISATEI
MARUKO DEMICHIERI
JIYUSETSUPE PATSUTEI
BUARERIO PISATEI
Application Number:
JP14376496A
Publication Date:
December 17, 1996
Filing Date:
May 14, 1996
Export Citation:
Assignee:
SGS THOMSON MICROELECTRONICS
International Classes:
H03M1/68; G06J1/00; H03M1/66; H03M1/78; (IPC1-7): H03M1/68; H03M1/78
Attorney, Agent or Firm:
Hiroyuki Mori
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