Patent ID: 7319353

Claim:
An enveloping curves generator comprising: a first steering device and a second steering device, where an input signal is connected to a control input on both steering devices, wherein the control input determines the on and off state of the steering devices, wherein the first steering device controls the voltage at a first node when the input signal is in the low state, and wherein the second steering device controls the voltage at a second node when the input signal is in the high state; a first circuit having an output and an input connected to the first node; a second circuit having an output and an input connected to the second node; a first switch functionally disposed between the first circuit output and the second node; a second switch functionally disposed between the second circuit output and the first node; wherein when the input is in the low state, the first switch is deactivated, and the second switch is activated making a connection from the second circuit output to the first node, and when the input is in the high state, the second switch is deactivated, and the first switch is activated making a connection from the first circuit output to the second node; and when the input traverses from the high state to the low state, the output of the first circuit changes before the output of the second circuit, and then when the input traverses from the low state to the high state, the output of the second circuit changes before the output of the first circuit.