Patent ID: 6088756
Filing Date: 2000-07-11
Classification: G06F,H03K

Abstract:
A multi-state driver having at least four output states, said multi-state driver comprising:a data input for receiving a data signal having first and second logical states, a clock input for receiving a clock signal having first and second logical states, and a data output;an output circuit coupled to said data output and having four selectable output states: the first output state being a voltage mode state having a low output voltage and a low output impedance, the second output state being a current mode state having a low output voltage and a high output impedance, the third output state being a voltage mode state having a high output voltage and a low output impedance, and the fourth output state being a current mode state having a high output voltage and a high output impedance; andan input circuit coupled to said data input, said clock input, and said output circuit, said input circuit causing the first output state to be selected in response to the data signal being in the first state and the clock signal being in the first state, said input circuit causing the second output state to be selected in response to the data signal being in the first state and the clock signal being in the second state, said input circuit causing the third output state to be selected in response to the data signal being in the second state and the clock signal being in the first state, said input circuit causing the fourth output state to be selected in response to the data signal being in the second state and the clock signal being in the second state.