초록 ▼

An integrated circuit (10, 22) contains an active bypass (36) that inhibits high-frequency supply-voltage variations caused by interaction of the circuitry elements (28) with the parasitic inductances (LHE, LHP, LLP, and LLE) associated with the power supply lines (16H/24H/26H/32H and 16L/24L/26L/32

An integrated circuit (10, 22) contains an active bypass (36) that inhibits high-frequency supply-voltage variations caused by interaction of the circuitry elements (28) with the parasitic inductances (LHE, LHP, LLP, and LLE) associated with the power supply lines (16H/24H/26H/32H and 16L/24L/26L/32L) for the circuit. The bypass centers around a transistor (QBP) coupled between the supply lines. An activation circuit (38) provides the transistor with a control signal (VC) to activate the transistor. A sensing capacitor (CS) provides a capacitive action between the transistor control electrode and one of the supply lines.

대표청구항 ▼

An integrated circuit which comprises a group of electronic circuitry elements formed in a semiconductor die comprising a semiconductive body and an adjoining electrical interconnection system that includes first and second internal power supply lines for transmitting first and second supply voltage

An integrated circuit which comprises a group of electronic circuitry elements formed in a semiconductor die comprising a semiconductive body and an adjoining electrical interconnection system that includes first and second internal power supply lines for transmitting first and second supply voltages to provide power for the circuitry elements, the die including bypass means for inhibiting variations in the supply voltages, characterized in that the bypass means comprises: a bypass transistor having a first flow electrode coupled to the first supply line, a second flow electrode coupled to the second supply line, and a control electrode for controlling current flow between the flow electrodes, the conductivity of the transistor substantially depending on the voltage difference between the control electrode and the first electrode; activation means for providing the control electrode with a control signal to activate the transistor so as to maintain it in a conductive condition substantially whenever the circuitry elements are powered; and a sensing capacitor that provides a capacitive action between the second supply line and the control electrode.