Patent ID: 7991814

Claim:
A differentiator cell comprising: a first input terminal for receiving a carry input; a first flip flop having an input coupled to said first input terminal and an output coupled to an input of a toggle flip flop (TFF); a data input terminal for receiving a data bit; a second flip flop having an input coupled to said data input terminal and an output coupled to an input of the TFF; a clocked not-cell responsive to the data bit for generating an output signal which corresponds to the two's complement of the data bit and for applying said output signal to the input of the TFF; a clock input for receiving a clock signal; means coupling the clock input to the first and second flip flops and to the not-cell for triggering the first and second flip flops and the not-cell in a predetermined sequence for causing their outputs to be applied as distinct and separate pulses to the input of the TFF; and the TFF being responsive to the signals at its input for producing a carry output and a data output in response to a clocked data read signal.