The Investment Performance of Defaulted Bonds for 1994 and 1987-1994

This invention provides a fast response driver circuit with a thermal protection network for charging and discharging capacitive loads of the type found in semiconductor memories of data processing units. To ensure rapid response to input signals, the circuit comprises separate amplifying networks for rising and falling output signals. The driver circuit includes a protection network, activated by a thermally sensitive element, which disables the two amplifier networks in the event that the temperature of the element is above a selected value. The protection circuit is arranged so that an increase in supply voltage causes the protection network to be more sensitive as temperature increases. A status indicator network is included for communicating the state of the driver circuit output to circuits associated with the semiconductor memory.