Active bypass for inhibiting high-frequency supply voltage variations in integrated circuits
US5049764A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Jan 25, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/1305
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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 (L.sub.HE, L.sub.HP, L.sub.LP, and L.sub.LE) associated with the power supply lines (16.sub.H /24.sub.H /26.sub.H /32.sub.H and 16.sub.L /24.sub.L /26.sub.L /32.sub.L) for the circuit. The bypass centers around a transistor (Q.sub.BP) coupled between the supply lines. An activation circuit (38) provides the transistor with a control signal (V.sub.C) to activate the transistor. A sensing capacitor (C.sub.S) provides a capacitive action between the transistor control electrode and one of the supply lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.