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Patent US3833772A successfully refreshed from Google Patents.
US3833772A
Expired / Lapsed
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Time division resonant transfer hybrid circuit and method
Assignee: AG Communication Systems Corp
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Filing: 1973-04-09
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Granted: 1974-09-03
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Expires: 1993-04-09
Abstract
Abstract A time division hybrid circuit for communications systems which functions by means of a plurality of resonant transfer energy storage devices connected to the line, transmitting and receiving terminals of the system and a plurality of gates for periodically connecting the devices in a manner achieving the desired hybrid function. More specifically, the line connected device is periodically connected to the transmitting terminal connected device at a sampling frequency of at least two times the highest message frequency of interest (Nyquist theorem) to establish periodic conducting periods effecting resonant transfer of energy from the line device to the transmitting device; and the receiving terminal connected device is connected to the line connected device at the same sampling frequency for establishing second conducting periods effecting resonant transfer of energy with each of the second conducting periods closely following each first named conducting period and within the sampling interval.
Inventors
- 👤 L Getgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/58; H04B1/588; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A time division hybrid circuit for communication systems having line and transmitting and receiving terminals comprising: first, second, and third energy storing devices constructed for energy transfer in a resonant transfer mode and being connected to said terminals, respectively; a first analog gate connecting said first and second devices; a second analog gate connecting said first and third devices; and means for closing and opening said first and second gates in sequence with said gates closing for a period effecting said energy transfer and providing for the closing of said second gate as closely following as possible without significant overlap after the opening of said first gate, said means effecting said closing and opening at a sampling frequency equal to at least two times the highest significant message frequency to be transmitted by the system.
Claim 2
Dependent Claim
135 words
A time division hybrid circuit for communication systems having line and transmitting and receiving terminals comprising: first, second, and third energy storing devices constructed for energy transfer in a resonant transfer mode and being connected to said terminals, respectively; a first analog gate connecting said first and second devices; a second analog gate connecting said first and third devices; and means for closing and opening said first and second gates in sequence with said gates closing for a period effecting said energy transfer and providing for the closing of said second gate as closely following as possible without significant overlap after the opening of said first gate, said means effecting said closing and opening at a sampling frequency equal to at least two times the highest significant message frequency to be transmitted by the system.
Claim 3
Dependent Claim
13 words
A circuit as defined in claim 1: said first device comprising a filter.
Claim 4
Dependent Claim
23 words
A circuit as defined in claim 2: said devices comprising: capacitors; and inductor connecting said capacitors and functioning therewith to provide resonant circuits.
Claim 5
Dependent Claim
19 words
A circuit as defined in claim 3: said inductor connecting the capacitor of said first device and said gates.
Claim 6
Dependent Claim
30 words
A circuit as defined in claim 4: an oscillator; a frequency division counter connected to said oscillator; and word detector gates connected to said counter and said first named gates.
Claim 7
Dependent Claim
24 words
A circuit as defined in claim 3: said filter being a lowpass filter having a cut-off frequency not exceeding one-half of said sampling frequency.
Claim 8
Dependent Claim
27 words
A circuit as defined in claim 6: said second and third devices comprising filters compatible with said first named filter for operation in a resonant transfer mode.
Claim 9
Dependent Claim
31 words
A circuit as defined in claim 7: said second and third devices comprising lowpass filters each having a cut-off frequency substantially equal to the cut-off frequency of said first named filter.
Claim 10
Dependent Claim
41 words
A circuit as defined in claim 6: said second and third devices comprising bandpass filters compatible with said first-named filter for operation in a resonant transfer mode, and said bandpass filters having bandwidths equal to the bandwidth of said first-named filter.
Claim 11
Dependent Claim
76 words
A circuit as defined in claim 1: said second device comprising a capacitor and a discharge gate connected across said capacitor; an encoder and pulse code modulated transmitter connected to said capacitor and to said transmitting terminal; means periodically closing said discharge gate following encoding of the signal on said capacitor; said third device comprising a capacitor; and a decoder and pulse code modulated receiver connected to said last named capacitor and to said receiving terminal.
Claim 12
Independent Claim
146 words
A method of obtaining a hybrid function in a communications system having line and transmitting and receiving terminals comprising: selecting first, second, and third energy storing devices constructed for energy transfer in a resonant transfer mode and connecting said devices to said terminals, respectively; periodically connecting said first device to said second device at a sampling frequency of at least two times the highest message frequency of interest to establish periodic conducting periods effecting resonant transfer of energy from said first to said second device; and sequentially periodically connecting said third device to said first device at said sampling frequency for establishing second conducting periods effecting resonant transfer of energy from said third to said first device and with each said second conducting period occurring as closely following as possible without significant overlap each first-named conducting period and within the interval provided by said sampling frequency.
Claim 13
Independent Claim
146 words
A method of obtaining a hybrid function in a communications system having line and transmitting and receiving terminals comprising: selecting first, second, and third energy storing devices constructed for energy transfer in a resonant transfer mode and connecting said devices to said terminals, respectively; periodically connecting said first device to said second device at a sampling frequency of at least two times the highest message frequency of interest to establish periodic conducting periods effecting resonant transfer of energy from said first to said second device; and sequentially periodically connecting said third device to said first device at said sampling frequency for establishing second conducting periods effecting resonant transfer of energy from said third to said first device and with each said second conducting period occurring as closely following as possible without significant overlap each first-named conducting period and within the interval provided by said sampling frequency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |