Synchronous digital data transmitter

A data transmitter, comprising:

• a clock pulse generator;
• a source of data, such data being transmitted in response to clock pulses produced by the clock pulse generator at an input data rate;
• a buffer having a fixed data storage capacity for storing the data transmitted by the source of data, such data being stored in response to the clock pulses;
• a framer for retrieving the stored data in response to a data strobe signal produced by the framer and fed to the buffer;
• and
• a superframe strobe signal source is fed to the clock pulse generator, such signal being produced for each of a plurality of superframes of data produced by the transmitter and wherein the superframe strobe signal samples the level of the buffer and produces a control level signal representative of the sampled level of the buffer;
• a clock pulse generator for producing the clock pulses for the data source and the buffer at a rate selected in accordance with the control signal;
• wherein data stored in the buffer is read from the buffer in response to the data strobe signal;
• and
• wherein such data is provided at an output of the transmitter.

A method of synchronous signal digital data transmission, said method comprising:

• transmitting a source of data in response to clock pulses;
• providing a buffer having a fixed data storage capacity for storing the data transmitted by the source of data, such data being stored in response to the clock pulses;
• retrieving the stored data in response to a strobe signal produced and fed to the buffer;
• producing a control signal representative of the level of the buffer;
• producing the clock pulses for the data source and the buffer at a rate selected in accordance with the control signal;
• reading data stored from the buffer in response to the strobe signal;
• and
• providing such data at an output.

A method of synchronous signal digital data transmission, said method comprising:

• transmitting a source of data in response to clock pulses;
• providing a buffer having a fixed data storage capacity for storing the data transmitted by the source of data, such data being stored in response to the clock pulses;
• retrieving the stored data in response to a strobe signal produced and fed to the buffer;
• providing a superframe strobe signal source, such signal being produced for each of a plurality of superframes of data produced for each of a plurality of superframes of data produced by a transmitter and wherein the superframe strobe signal samples the level of the buffer and produces a control level signal representative of the sampled level of the buffer;
• producing the clock pulses for the data source and the buffer at a rate selected in accordance with the control signal;
• reading data stored from the buffer in-response to the strobe signal;
• and
• providing such data at an output.