Reset circuit, data carrier and communication device
First Claim
1. Reset circuit comprising a clock signal input for receiving a clock signal consisting of a sequence of clock signal cycles, comprising a data signal input for receiving digital data signals, said digital data signals being encoded in such a manner that at least one signal edge appears per data bit in the data signal, comprising a counting stage being connected to the data signal input and the clock signal input and being designed for counting a number of clock signal cycles, which clock signal cycles appear between a defined number of data signal edges, and comprising comparing means, said comparing means being designed for comparing the number of clock signal cycles counted by the counting stage with a lower limit and/or with an upper limit and said comparing means being designed to emit a reset signal, if the number either remains below the lower limit or exceeds the upper limit, depending on the limit value taken for comparison.
2 Assignments
0 Petitions
Accused Products
Abstract
In a reset circuit (1) comprising a clock signal input (RC) for receiving a clock singal CL MD signal (CL) consisting of a sequence of clock signal cycles, and comprising a data signal input (RD) for receiving digital data signals (MD), which are encoded in such a manner that at least one signal edge (0→1, 1→ 0) appears per data bit in the data signal, are provided a counter (2) being connected to the data signal input (RD) and the clock signal input (RC) and being designed for counting the number (X) of clock signal cycles, which appear between a defined number of data signal edges, and comparing means (3), which comparing means (3) being designed for comparing the number (X) of clock signal cycles counted by the counter (2) with a lower limit (MIN) and/or with an upper limit (MAX) and which comparing means (3) being designed to produce a reset signal (RS), if the number (X) either remains below the lower object (MIN) or exceeds the upper limit (MAX), depending on the limit value (MIN, MAX) taken for comparison.
-
Citations
12 Claims
- 1. Reset circuit comprising a clock signal input for receiving a clock signal consisting of a sequence of clock signal cycles, comprising a data signal input for receiving digital data signals, said digital data signals being encoded in such a manner that at least one signal edge appears per data bit in the data signal, comprising a counting stage being connected to the data signal input and the clock signal input and being designed for counting a number of clock signal cycles, which clock signal cycles appear between a defined number of data signal edges, and comprising comparing means, said comparing means being designed for comparing the number of clock signal cycles counted by the counting stage with a lower limit and/or with an upper limit and said comparing means being designed to emit a reset signal, if the number either remains below the lower limit or exceeds the upper limit, depending on the limit value taken for comparison.
-
12. A reset method for resetting a data carrier and its logic circuit respectively, in a defined logical state, comprising reception of a clock signal consisting of a sequence of clock signal cycles, and comprising reception of digital data signals, said digital data signals being encoded in such a manner that at least one signal edge appears per data bit in the data signal and comprising counting of a number of clock signal cycles, which clock signal cycles appear between a defined number of data signal edges, and comprising comparison of the number of counted clock signal cycles with a lower limit and/or with an upper limit and comprising emitting of a reset signal for the logic circuit if the number either remains below the lower limit or exceeds the upper limit depending on the limit value taken for comparison.
Specification