Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1998-09-10
2000-10-03
Phan, Trong
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341122, H03M 112, H03M 100
Patent
active
061279587
ABSTRACT:
An analog/digital (A/D) converting circuit is provided that stabilizes system operation, reduces power consumption in an analog circuit region and uses a selected metal-to-metal capacitor, which has a small parasitic capacitance value. The A/D converting circuit includes a first sample/hold amplifier for sampling/holding an analog input signal, a switch for selecting one of a signal outputted from the first sample/hold amplifier and a feedback signal and an A/D sub-converter for converting an analog signal outputted from the switch to a digital signal. A multiplying D/A converting block converts an output signal from the A/D sub-converter to an analog signal and amplifies a difference value obtained between the analog signal and the analog signal outputted from the switch. A second sample/hold amplifier samples/holds a signal outputted from the multiplying D/A converting block and outputs the feedback signal to the switch. A digital correcting unit outputs an N bit digital signal by superimposing output signals from the A/D sub-converter by 1 bit and a timing controller generates a control signal and a timing clock signal for the operation of each unit.
REFERENCES:
patent: 4894656 (1990-01-01), Hwang et al.
patent: 5710563 (1998-01-01), Vu et al.
Chang Dong-Young
Lee Jae-Yup
Lee Seung-Hoon
Park Seung Woo
Park Yong-In
Hyundai Electronics Industries Co,. Ltd.
Phan Trong
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