Abstract:
A switching circuit for an FET transistor includes a controlled current circuit coupled to the gate of the FET. The input (36) to the controlled current circuit represents a desired rate of change of gate voltage of the FET and is generated by a circuit responsive to the average specific transconductance of two FETs (41,42) of similar specific transconductance operating at different drain current densities. Circuitry (51,52) is responsive to different gate voltages of the transistors (41,42) at the respective drain current densities to operate the signal (36).
Abstract:
A switching circuit for an FET transistor includes a controlled current circuit coupled to the gate of the FET. The input (36) to the controlled current circuit represents a desired rate of change of gate voltage of the FET and is generated by a circuit responsive to the average specific transconductance of two FETs (41,42) of similar specific transconductance operating at different drain current densities. Circuitry (51,52) is responsive to different gate voltages of the transistors (41,42) at the respective drain current densities to operate the signal (36).
Abstract:
A memory is provided with at least one temporary store (21,22) and write abort circuitry (41,42) having a control signal store (41) and gating circuitry (43,44) responsive to an output from the control signal store. Write circuitry loads data and an associated address in the temporary store (21,22) during one write cycle and transfer circuitry (13,23) transfers the data to the associated address during a subsequent write cycle when the write operation is not to be aborted. Read circuitry includes a comparator (27) for comparing a read address with an address in the temporary store (22) and transfer circuitry includes selection circuitry (24) to select an output of data either from the temporary store (21) or the memory (11) dependent on the output of the comparator circuitry (27), an output from the temporary store (21) being prevented if the control signal store (41) indicates that the write operation is to be aborted.