LVDS input circuit with connection to input of output driver
AssigneeTexas Instruments Incorporated
InventorLee D. Whetsel
Life of this patent
Estimating the term…
Abstract
First and second devices may simultaneously communicate bidirectionally with each other using only a single pair of LVDS signal paths. Each device includes an input circuit and a differential output driver connected to the single pair of LVDS signal paths. An input to the input circuit is also connected to the input of the driver. The input circuit may also receive an offset voltage. In response to its inputs, the input circuit in each device can use comparators, gates and a multiplexer to determine the logic state being transmitted over the pair of LVDS signal paths from the other device. This advantageously reduces the number of required interconnects between the first and second devices by one half.
Claims4
An LVDS signaling device, comprising:
- A. a first LVDS signal path;
- B. a second LVDS signal path;
- C. an LVDS driver having a non-inverting output connected to the first LVDS signal path, an inverting output connected to the second LVDS signal path, and a data input lead;
- D. a first resistor connected in series between the non-inverting output and the first LVDS signal path;
- E. a second resistor connected in series between the inverting output and the second LVDS signal path;
- F. a third resistor connected between the first and second LVDS signal paths;
- and
- C. an input circuit having one non-inverting input that is connected to the first LVDS signal path, one inverting input that is connected to the second LVDS signal path, a data output and one input lead connected to the data input lead of the LVDS driver.
Dependencies are inferred from the claim text.