US3803591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A-d conversion system using magnetic bubbles
Assignee: KDDI Corp
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Filing: 1972-10-18
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Granted: 1974-04-09
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Expires: 1992-10-18
Abstract
Abstract An A-D conversion system, for converting an analog input signal to a digital signal, comprising an orthoferrite sheet on which are disposed circuits comprising a bubble generating section, a bubble selection section, an encoding section and a transmission section. The bubble generating section generates a number of magnetic bubbles in the orthoferrite sheet equal to the number of quantization levels corresponding to the maximum value of the analog input signal being converted. In the bubble generating section bubbles are transferred from bubble holding loops to bubble dividing loops where they are divided. Bias control loops transfer a number of the divided bubbles equal to the quantization level of the analog signal at a sampling time to the selection section. The selection section selects the bubble corresponding to the most significant digit of the value of the sampled analog signal and transmits the selected bubble to the encoding section. The encoding section comprises drive loops for encoding the sampled analog signal value, represented by the selected bubble, into a particular code. Bubbles representing the encoded value of the sampled signal are transferred to the transmission section where they are available for transmission to other circuits. The system can be provided with an output circuit for converting the output bubbles to a voltage proportional to the sampled value of the analog voltage, storage circuits for storing magnetic bubbles representative of the analog signals sampled value in the orthoferrite sheet, and delay circuits to delay the transfer of bubbles within the system or at the output by controllable increments of time.
Inventors
- 👤 T Watanabe
- 👤 H Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:34
CPC Classifications
H; H03; H03M; H03M1/00; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168; H03M1/12; H03M1/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
An A-D conversion system for an input analog signal using magnetic bubbles produced in a magnetic sheet, comprising the following means disposed in close contact with one surface of the magnetic sheet: first generating means for generating the magnetic bubbles of a number equal to the number of quantization levels which are determined to correspond to a maximum level of the input analog signal; second generating means coupled to the first generating means for dividing the magnetic bubbles corresponding in number to an instantaneous level of the input signal from the magnetic bubbles equal in number to the quantization levels and for generating the divided magnetic bubbles; bubble selecting means coupled to the second generating means for picking up only one magnetic bubble corresponding to the highest level from the magnetic bubbles generated by the second generating means in response to the input signal; code means coupled to the bubble selecting means for generating magnetic bubbles which make up a digital code corresponding to the position of the one magnetic bubble picked up by the bubble selecting means; and high speed bubble transMitting means coupled to the code means for picking up at an output position at least one magnetic bubble which makes up the digital code.
Claim 2
Dependent Claim
207 words
An A-D conversion system for an input analog signal using magnetic bubbles produced in a magnetic sheet, comprising the following means disposed in close contact with one surface of the magnetic sheet: first generating means for generating the magnetic bubbles of a number equal to the number of quantization levels which are determined to correspond to a maximum level of the input analog signal; second generating means coupled to the first generating means for dividing the magnetic bubbles corresponding in number to an instantaneous level of the input signal from the magnetic bubbles equal in number to the quantization levels and for generating the divided magnetic bubbles; bubble selecting means coupled to the second generating means for picking up only one magnetic bubble corresponding to the highest level from the magnetic bubbles generated by the second generating means in response to the input signal; code means coupled to the bubble selecting means for generating magnetic bubbles which make up a digital code corresponding to the position of the one magnetic bubble picked up by the bubble selecting means; and high speed bubble transMitting means coupled to the code means for picking up at an output position at least one magnetic bubble which makes up the digital code.
Claim 3
Dependent Claim
176 words
An A-D conversion system for an input analogue signal using magnetic bubbles, comprising: a magnetic sheet; bubble generating means comprising drive sections disposed in close contact with the magnetic sheet so as to be equal in number to the quantization levels for a maximum level of the input analog signal for generating in the magnetic sheet a plurality of magnetic bubbles corresponding to the drive sections respectively; and bubble dividing means comprising a plurality of input drive sections disposed in close contact with the magnetic sheet and coupled with the drive sections of the bubble generating means respectively and weighted in order for dividing magnetic bubbles of a number corresponding to an instantaneous level of the input analog signal from the magnetic bubbles held in the drive sections of the bubble generating means and for holding the divided bubbles when the input analogue signal is applied to the input drive sections, an instantaneous value of the input analog signal being caused to correspond to the number of the magnetic bubbles held by the bubble dividing means.
Claim 4
Dependent Claim
176 words
An A-D conversion system for an input analogue signal using magnetic bubbles, comprising: a magnetic sheet; bubble generating means comprising drive sections disposed in close contact with the magnetic sheet so as to be equal in number to the quantization levels for a maximum level of the input analog signal for generating in the magnetic sheet a plurality of magnetic bubbles corresponding to the drive sections respectively; and bubble dividing means comprising a plurality of input drive sections disposed in close contact with the magnetic sheet and coupled with the drive sections of the bubble generating means respectively and weighted in order for dividing magnetic bubbles of a number corresponding to an instantaneous level of the input analog signal from the magnetic bubbles held in the drive sections of the bubble generating means and for holding the divided bubbles when the input analogue signal is applied to the input drive sections, an instantaneous value of the input analog signal being caused to correspond to the number of the magnetic bubbles held by the bubble dividing means.
Claim 5
Dependent Claim
199 words
An A-D conversion system according to claim 2, further comprising a drive source coupled to the dividing means to cause the dividing means to achieve the division every constant period; memory means having a plurality of drive sections arranged in close contact with the magnetic sheet in such a manner as to be coupled to the input drive sections of the dividing means respectively and for sequentially receiving the magnetic bubbles divided by the dividing means every constant period to temporarily store the received magnetic bubbles; shift means having a plurality of drive section groups each comprising a plurality of drive sections for parallel shifting, the magnetic bubbles temporarily stored in the memory means, in the magnetic sheet in synchronism with the constant period; and detecting means arranged in close contact with the magnetic sheet in such a manner as to be coupled to the drive sections of each stage of the shift means and so connected as to obtain the sum of detected signals obtained by detecting the magnetic bubbles held in the corresponding drive sections; and in which a digitalized output of the input analogue signal is taken out through the detecting means at the constant period.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |