Patent US5260612A successfully refreshed from Google Patents.
US5260612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-level dual mode transceiver
Assignee: Dallas Semiconductor Corp
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Filing: 1990-12-14
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Granted: 1993-11-09
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Expires: 2010-12-14
Abstract
Abstract A transceiver (100) for TTL and RS232 communication with automatic sensing (130) of the type of input and adjustment of the output to correspond together with current stealing (131) from the input communication lines to provide extreme voltages for transmission. Hysteresis and surge suppression are built into the sensing.
Inventors
- 👤 Guenter H. Lehmann
- 👤 II William L. Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/0175; H03K19/0185; H03K19/018585
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A transceiver, comprising: (a) a first input terminal; (b) a first output terminal: (c) a first driver coupled to said first output terminal, said first driver having at least two modes of operation with said two modes of operation corresponding to different driver output voltage ranges; (d) a sense circuit coupled to said first input terminal and said first driver, said sense circuit selecting the mode of operation of said first driver in response to characteristics of input signals received at said first input terminal; (e) a second input terminal coupled to said first driver; (f) a second output terminal; (g) a second driver coupled to said second output terminal and to said first input terminal; (h) wherein said first driver transmits signals at said first output terminal in response to input signals received at said second input terminal, and said second driver transmits signals at said second output terminal in response to input signals received at said first input terminal.
Claim 2
Dependent Claim
161 words
A transceiver, comprising: (a) a first input terminal; (b) a first output terminal: (c) a first driver coupled to said first output terminal, said first driver having at least two modes of operation with said two modes of operation corresponding to different driver output voltage ranges; (d) a sense circuit coupled to said first input terminal and said first driver, said sense circuit selecting the mode of operation of said first driver in response to characteristics of input signals received at said first input terminal; (e) a second input terminal coupled to said first driver; (f) a second output terminal; (g) a second driver coupled to said second output terminal and to said first input terminal; (h) wherein said first driver transmits signals at said first output terminal in response to input signals received at said second input terminal, and said second driver transmits signals at said second output terminal in response to input signals received at said first input terminal.
Claim 3
Dependent Claim
30 words
The transceiver of claim 1, wherein: (a) said first driver has a first mode of operation compatible with RS232 specifications and a second mode of operation compatible with TTL specifications.
Claim 4
Dependent Claim
51 words
The transceiver of claim 2, wherein: (a) said first input terminal receives signals compatible with either RS232 specifications or TTL specifications and connected circuitry provides a corresponding input impedance; (b) said second input terminal receives signals compatible with TTL specifications; and (c) said second driver transmits signals compatible with TTL specifications.
Claim 5
Dependent Claim
41 words
The transceiver of claim 1, further comprising: (a) a charge circuit coupled to said first input terminal and said first driver, said charge circuit drawing energy from signals received at said first input terminal and supplying energy to said first driver.
Claim 6
Dependent Claim
26 words
The transceiver of claim 4, further comprising: (a) a storage capacitor coupled to said charge circuit and storing portions of said energy drawn from said signals.
Claim 7
Independent Claim
73 words
A method of communication, comprising the steps of: (a) providing a driver for transmission of signals, said driver with at least two modes of operation with said two modes of operation corresponding to different driver output voltage ranges; (b) receiving signals at an input terminal; (c) sensing the characteristics of said received signals; and (d) selecting the mode of operation of said driver in accordance with the sensed characteristics of said received signals.
Claim 8
Independent Claim
73 words
A method of communication, comprising the steps of: (a) providing a driver for transmission of signals, said driver with at least two modes of operation with said two modes of operation corresponding to different driver output voltage ranges; (b) receiving signals at an input terminal; (c) sensing the characteristics of said received signals; and (d) selecting the mode of operation of said driver in accordance with the sensed characteristics of said received signals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |