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公开(公告)号：JPH08335880A
公开(公告)日：1996-12-17
申请号：JP14376496
申请日：1996-05-14
Applicant: SGS THOMSON MICROELECTRONICS
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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公开(公告)号：JPH08288794A
公开(公告)日：1996-11-01
申请号：JP3478396
申请日：1996-02-22
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： ROBERUTO ARIINI , FURANCHIESUKO BURIANTEI , BUARERIO PISATEI , MARUKO DEMIKERI
Abstract: PROBLEM TO BE SOLVED: To provide a basic cell structure for a programmable analog type time sequential filter, especially for performing the processing of the analog signals of a read/write operation in a magnetic supporting body. SOLUTION: This structure is provided with an amplification stage 3 provided with a pair of structurally same mutual conductance half cells 2 and 2' connected to a common circuit node X. A time sequential analog delay line used in the analog type orthogonal time sequential filter is provided with the cell of the cascade connection of this kind. The filter is provided with the same delay line LR of the cascade connection connected to a final addition node 6 through a multiplication node 5.
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