Patent ID: 7205789

Claim:
A circuit for terminating devices attached to a signal line and driving a receiver or driver, the circuit comprising: (a) a resistor R 1 in series with the signal line; (b) a circuit CR 1 comprising a resistor r 2 in series with a switch s 1 , wherein CR 1 is in parallel with R 1 ; (c) a circuit CR 2 comprising a resistor R 3 in series with switch S 2 , connected at one end to Vcc and at the other end to the receiver or driver; (d) a circuit CR 3 comprising a resistor R 5 in series with switch S 4 , connected at one end to Vcc and at the other end to the receiver or driver; (e) a circuit CR 4 comprising a resistor R 6 in series with switch S 5 , connected at one end to GND and at the other end to the receiver or driver; (f) a circuit CR 5 comprising a resistor R 4 in series with switch S 3 , connected at one end to ground and at the other end to the receiver or driver; and (g) a capacitor connected between the receiver or transmitter and ground.