Programmable digital signal delay device and its use for a error correction code device
First Claim
1. A delay device for delaying a digital serial input signal SIN by a programmable integer number M of periods H, so by a time τ
- =M.H, and for transforming it into a delayed digital serial output signal SOUT having the same bit rate as SIN, comprising an at least one-bit input register, a random access memory (RAM) connected to the input register and having a plurality r of memory locations each location containing an integer number p of bits which is at least equal to 1, an at least one-bit output register connected to the random access memory, and means for controlling the RAM including a decoder which receives the number M in digital form on an input bus, and produces a programming number N on an output bus, a cyclic counter connected to the decoder and the RAM which receives, from the output bus of the decoder, the programming number N or its principal part n and cyclically addresses the RAM, and a sequencer connected to the cyclic counter for receiving a write/read control signal from the cyclic counter and supplying the RAM with write and read control signals.
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Accused Products
Abstract
A programmable digital signal delay device for delaying a digital serial input signal SIN by a period τ=M.H. (where M is an integer H is the bit rate) and transforms SIN into a delayed output signal SOUT having the same bit rate, the number M being programmable in steps. The device includes an input register (4), a RAM (6) whose r bit locations contain p bits, an output register (8) and means for controlling the RAM which are formed by a decoder (11) which receives the number M, a cyclic counter (12) which receives a programming number N (or n) from the decoder whereby it cyclically addresses the RAM, and a sequencer (13) which supplies the RAM with the write and read control signals.
5 Citations
9 Claims
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1. A delay device for delaying a digital serial input signal SIN by a programmable integer number M of periods H, so by a time τ
- =M.H, and for transforming it into a delayed digital serial output signal SOUT having the same bit rate as SIN, comprising an at least one-bit input register, a random access memory (RAM) connected to the input register and having a plurality r of memory locations each location containing an integer number p of bits which is at least equal to 1, an at least one-bit output register connected to the random access memory, and means for controlling the RAM including a decoder which receives the number M in digital form on an input bus, and produces a programming number N on an output bus, a cyclic counter connected to the decoder and the RAM which receives, from the output bus of the decoder, the programming number N or its principal part n and cyclically addresses the RAM, and a sequencer connected to the cyclic counter for receiving a write/read control signal from the cyclic counter and supplying the RAM with write and read control signals.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification