Boots – shoes – and leggings
Patent
1985-02-07
1987-03-31
Ruggiero, Joseph
Boots, shoes, and leggings
340347M, 340347CC, 340347SH, 364602, 364604, G06J 100
Patent
active
046548157
ABSTRACT:
An analog signal conditioning and digitizing integrated circuit is provided having a multiplying digital to analog converter means (MDAC) including a gain capacitor array and an offset capacitor array, an operational amplifier, a feedback circuit including a feedback capacitor and a feedback clamping transistor, the operational amplifier and feedback circuit connected to the gain and offset capacitor arrays for setting the gain and the amount of offset correction of the MDAC, a correlated double sample circuit including a series capacitor connected to the operational amplifier and a series clamping transistor connected to the junction of the series capacitor and a buffer amplifier for sampling the noise to be substracted and/or nulled across the series capacitor, and an analog to digital converter operatively connected to the MDAC for digitizing the output of the MDAC. In other embodiments the integrated circuit has separate bond pads for the analog signal inputs and outputs of the MDACs and DACs or for implementing feedback/feedforward discrete time transfer functions.
REFERENCES:
patent: 3972627 (1976-08-01), Rabl et al.
patent: 4150366 (1979-04-01), Price
patent: 4439756 (1984-03-01), Shenoi et al.
patent: 4456963 (1984-06-01), Wiggins
patent: 4472707 (1984-09-01), Wilensky et al.
patent: 4535411 (1985-08-01), Blackburn et al.
patent: 4573026 (1986-02-01), Curtis et al.
Marin James S.
Tan Khen-Sang
Bandy Alva H.
Heiting Leo N.
Ruggiero Joseph
Sharp Melvin
Texas Instruments Incorporated
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