m bit to n bit code converting circuit.

摘要

An mBnB code converting circuit for converting an input m bits data into an n bits code including a status check/hold means (80) which is setting and holding a status bit corresponding to a mark ratio of an input m bits data with an input m bits data. After setting and checking a status bit are complete, the status bit is transmitted to the code converter (3) in order to control the code converter (3), and the held input m bits data is also transmitted to an output selection circuit (4) with an n bits code from the code converter (3). An mBnB code converting circuit for decoding an input n bits code into an m bits data is also provided in the same manner.