Patent ID: 6420897
Filing Date: 2002-07-16
Classification: H04L

Abstract:
A CMOS-SOI (complementary metal oxide semiconductorâ€”silicon on insulator) terminator circuit for connection to a network carrying small logic level signals from a network's first circuit to a network's second circuit in which a network's input terminal connects a terminator circuit to the network's second circuit to act as a terminator on the data line passing data from said first circuit to said second circuit, comprising:a terminator reference circuit (30) coupled to a terminator input circuit (31) in said terminator, said terminator input circuit being coupled to said network input terminal for connecting the network's first circuit to the network's second circuit, said terminator reference circuit having back to back gate to drain connected control nfet and pfet devices in the reference circuit which control the voltage level supplied to terminator input circuit's corresponding mirror nfet and pfet devices to control each of the the mirror nfet and pfet device's turn on voltages, the bodies of the nfet devices being connected to a lower level power supply or ground, and the bodies of said pfets being connected to an upper level power supply or vdd; and wherein said second node (15) having a voltage level above the tuned voltage reference level is connected to the gate of a terminator input circuit nfet (16) device and said first node (14) having a voltage level below the tuned voltage reference level is connected to the gate of a terminator input circuit pfet (17) whereupon, after arriving at the mirrored devices of the terminator input circuit (21), the voltages on both sides of the tuned reference voltages are combined by the coupled mirrored devices of said terminator input circuit to control the value of the signal of the terminator pad (10) with the sources of a terminator input circuit nfet (16) device and pfet (17) device coupled together and to the network input terminal, whereby the terminator circuit is connected to the network to connect to the driving circuit (25) to the network driven input circuit (14).