Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1993-03-15
1995-03-07
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341166, 377 42, H03M 160
Patent
active
053962478
ABSTRACT:
A pulse circulating circuit includes inverting circuits each for inverting an input signal and outputting an inversion of the input signal. A time of signal inversion by each of the inverting circuits varies in accordance with a power supply voltage applied thereto. One of the inverting circuits constitutes an inverting circuit for starting which is controllable in inversion operation. The pulse circulating circuit circulates a pulse signal therethrough after the inverting circuit for starting starts to operate. An input terminal subjected to an analog voltage signal is connected to power supply lines of the respective inverting circuits for applying the analog voltage signal to the inverting circuits as a power supply voltage fed thereto. A counter serves to count a number of times of complete circulation of the pulse signal through the pulse circulating circuit. A circulation position detecting device serves to detect a circulation position of the pulse signal in the pulse circulating circuit on the basis of output signals of the respective inverting circuits. A control device is operative for activating the inverting circuit for starting and thereby starting pulse circulating operation of the pulse circulating circuit, and for activating the circulation position detecting means at a moment which follows a moment of starting pulse circulating operation by a given time. An output device is operative for outputting digital data as an A/D conversion result. The A/D conversion result data has lower bits composed of output digital data of the circulation position detecting device, and higher bits composed of output digital data of the counter.
REFERENCES:
patent: 4758821 (1988-07-01), Nelson et al.
patent: 4998109 (1991-03-01), LeChevalier
patent: 5128624 (1992-07-01), Hashino et al.
"A 16b Oversampling A/D Conversion Technology using Triple Integration Noise Shaping" by Yasuyuki Matsuya et al; 1987 IEEE International Solid-State Circuits Conference: pp., 48-49.
"The Design of The High Speed A/D Converter by using Multi-Valued Logic " by G. U. Weinan; 1989 IEEE; pp., 188-194.
"A 12BIT 5.mu.sec CMOS Recursive ADC With 25mW power Consumption" by M. Yotsuyanagi et al; Proc. IEEE Custom Integr. Circuits Conf.; 1989; pp., 6.4.1-6.4.4.
"An 8-b 1.3-MHz Successive-Approximation A/D Converter" by K. H. Hadidi et al; IEEE Journal of Solid-State Circuits, vol. 25, No. 3; Jun. 1990; pp., 880-885.
Hattori Tadashi
Ohtsuka Yoshinori
Watanabe Takamoto
Nippondenso Co. Ltd.
Williams Howard L.
LandOfFree
Analog-to-digital conversion circuit having a pulse circulating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Analog-to-digital conversion circuit having a pulse circulating , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog-to-digital conversion circuit having a pulse circulating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1409575