Receiver for a switched signal on a communication line

Details Receiver for a switched signal on a communication line Receiver for a switched signal on a communication line

2003-09-24

2008-08-19

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S068000, C327S077000, C327S544000

Reexamination Certificate

active

07414439

ABSTRACT:
A receiver for receiving a switched signal on a communication line (1), such as a LIN bus, the signal varying between first and second voltage levels (sup, ground). The receiver comprises a comparator (31, 54) responsive to the relative values of the received signal voltage level (Vlin) and an input reference voltage level (Vsup). The comparator (31, 54) comprises a current generator (40, 41) selectively operatble when the recieved signal is asserted to produce an input current (Iin) which is a function of the received signal voltage level (Vlin) and a reference current (Isup) which is a function of the input reference voltage level (Vsup), and output means (28, 32, 31; 55, 56) responsive to the relative values of the input current (Iin) and the reference current (Isup). The output means (28, 32, 31; 56) is supplied with power at a voltage (VDD) substantially lower than the difference between the first and second voltage levels (Vsup, ground). A switch (26, 35, 46) responsive to the input current (Iin) reduces the power consumption of the comparator when the received signal is de-asserted.

REFERENCES:
patent: 4716372 (1987-12-01), Fauser et al.
patent: 4827205 (1989-05-01), Hafner et al.
patent: 5629702 (1997-05-01), Koyasu et al.
patent: 6281714 (2001-08-01), Ang et al.
patent: WO 95 34152 (1995-12-01), None

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