Bidirectional signal interface and related system and method
A bidirectional signal and interface technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., can solve the problems of large energy consumption, slow interface speed, and unideal characteristics of bidirectional signal interface, etc. Achieve the effect of less spare energy
Active Publication Date: 2014-01-08
FAIRCHILD SEMICON CORP
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Problems solved by technology
[0008] But these bi-directional signal interfaces may have undesirable characteristics
For example, existing interfaces may be relatively slow and may therefore limit the bandwidth between coupled circuits
In addition, existing interfaces can consume significant amounts of energy in the standby state, i.e. during no-signal transitions
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[0028] figure 1 Is a circuit diagram of an electronic system 10 that includes a bi-directional signal interface 12 with multiplexing capability, according to an embodiment of the present invention. combined as follows Figure 2-8 As discussed, interface 12 may be faster and consume less backup power than existing bidirectional interfaces, and may also provide other advantages over existing interfaces.
[0029] In addition to the interface 12, the system 10 includes a master circuit 14 and one or more slave circuits 16 1 -16 n , the main circuit 14 is powered by a low supply voltage V A and common supply voltage V C powered, from circuit 16 1 -16 n by V C and their respective independent high supply voltage V B1 -V Bn powered, where the high supply voltage V B1 -V Bn Can be the same or different. For example, the system 10 can be a mobile phone, and the main circuit 14 can be V A =1.8V and V C =0V (ground) to power the microprocessor, while the slave circuit 16 1...
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An embodiment of a bidirectional signal interface includes first and second nodes and first and second translating circuits. The first and second nodes are respectively operable to receive a first logic signal and a second logic signal. The first translating circuit has a first signal path coupled between the first and second nodes, is operable to sense a transition of the first logic signal on the first node, and, in response to the transition, is operable to couple the first logic signal to the second node via the first signal path. The second translating circuit has a second signal path that is coupled between the first and second nodes and that is parallel to the first signal path, is operable to sense a transition of the second logic signal on the second node, and is, in response to the transition of the second logic signal, operable to couple the second logic signal to the first node via the second signal path.
Description
[0001] priority claim [0002] This application claims priority to US Provisional Application Serial No. 60 / 876,592, filed December 22, 2006, which is hereby incorporated by reference. technical field [0003] The present invention relates to bidirectional signal interfaces and systems and methods related to bidirectional signal interfaces. Background technique [0004] A bidirectional signal interface allows communication between two or more circuits that generate logic signals having different voltage levels. For example, if the processor generates a low logic level (e.g., a logic 0 level) equal to 0 volts (V) and a high logic level (e.g., a logic 1 level) equal to 1.8V, and the memory generates a logic level equal to 0V 0 level and logic 1 level equal to 2.7V. Because of their different logic-one levels, it is generally not possible to directly connect a signal (eg, data address) node of a processor to a corresponding signal node of a memory. Instead, a bidirectional s...
Claims
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IPC IPC(8): H03K19/0175H03K19/0185
Inventor 黄雷朱丹阳迈伦·米斯克
Owner FAIRCHILD SEMICON CORP