Duty cycle compensation of RAM transmitters

摘要

Disclosed embodiments may include a circuit having a clock-to-output (TCO) compensation circuit coupled to a RAM pull-up transmitter and a RAM pull-down transmitter. The TCO compensation circuit may be configured to compare a first output with a second output and to generate a delay code, based on the comparison, for at least one other RAM transmitter on the die to adjust a duty cycle of a third output associated with the at least one other RAM transmitter. Other embodiments may be disclosed.

主权项

1. An apparatus, comprising:
a digital input terminal; a pull-up transmitter coupled to the digital input terminal and configured to selectively delay a rising edge of a first output; a pull-down transmitter coupled to the digital input terminal and configured to selectively delay a falling edge of a second output; and a clock-to-output (TCO) compensation circuit, coupled to the pull-up transmitter, the pull-down transmitter, and at least one random access memory (RAM) transmitter, to compare the first output with the second output and to generate a delay code, based on the comparison, for the at least one RAM transmitter to adjust a duty cycle of a third output associated with the at least one RAM transmitter, wherein to compare the first output with the second output, the TCO compensation circuit includes a rising edge phase detector to compare a delay between rising-edge signals from the pull-up transmitter and the pull-down transmitter.