초록 ▼

An AC signal filter useful in a truck tractor equipped with power line communication for indicating in the tractor the status of an automatic braking system (ABS) in a trailer to which the tractor can be connected. The filter comprises a first power line carrying DC power connected between the tract

An AC signal filter useful in a truck tractor equipped with power line communication for indicating in the tractor the status of an automatic braking system (ABS) in a trailer to which the tractor can be connected. The filter comprises a first power line carrying DC power connected between the tractor battery and a tractor ABS module. A second power line carrying DC power is connected from the tractor battery to a tractor connecting to a trailer ABS module. A first inductor is coupled in the first power line to block the passage of AC signals from the tractor ABS to the tractor battery, but permit the passage of DC current from the tractor battery to the tractor ABS module. A second inductor is coupled in the first power line to block the passage of AC signals from the trailer ABS module to the tractor battery but permit the passage of DC current from the tractor battery to the trailer ABS module. A capacitor is coupled between the first and second power lines for communicating AC signals between the tractor ABS module and the trailer ABS module.

대표청구항 ▼

An AC signal filter useful in a truck tractor equipped with power line communication for indicating in the tractor the status of an automatic braking system (ABS) in a trailer to which the tractor can be connected. The filter comprises a first power line carrying DC power connected between the tract

An AC signal filter useful in a truck tractor equipped with power line communication for indicating in the tractor the status of an automatic braking system (ABS) in a trailer to which the tractor can be connected. The filter comprises a first power line carrying DC power connected between the tractor battery and a tractor ABS module. A second power line carrying DC power is connected from the tractor battery to a tractor connecting to a trailer ABS module. A first inductor is coupled in the first power line to block the passage of AC signals from the tractor ABS to the tractor battery, but permit the passage of DC current from the tractor battery to the tractor ABS module. A second inductor is coupled in the first power line to block the passage of AC signals from the trailer ABS module to the tractor battery but permit the passage of DC current from the tractor battery to the trailer ABS module. A capacitor is coupled between the first and second power lines for communicating AC signals between the tractor ABS module and the trailer ABS module. s] Altera, MAX 9000 Programmable Logic Device Family, Data Sheet, Jun. 1996.* Cypress Semiconductor Corporation Advanced Data Sheet for Ultra 39000 "UltraLogic High Density CPLD Family" (6 pgs. including data sheets for Ultra 39192, Ultra 39256, Ultra 39384 and Ultra 39512) (Oct. 1995). U.S. patent application 08/940,437, filed Sep. 30, 1997, entitled "Symmetric Logic Block Input/Output Scheme". Xilinx, "XC4000 Series Field Programmable Gate Arrays", Product Specification, Version 1.04, pp. 4-5-4-180, (Sep. 18, 1996). AMD "The MACH5-256, Fifth Generation MACH.RTM. Architecture", Preliminary, Publication# 20796, Rev. C, pp. 1-40 (Issue Date: Jan. 1997). Altera Corporation, "MAX 9000 Programmable Logic Device Family", Data Sheet, Ver. 4, pp. 157-191, (6/96). Altera Corporation, "MAX 9000 Programmable Logic Device Family", Errata Sheet, Ver. 2.1, p. 1, (11/95). Altera Corporation, "FLEX 10K Embedded Programmable Logic Family", Data Sheet, Ver. 2, pp. 29-88, (6/96). Xilinx, "XC9500 In-System Programmable CPLD Family", Product Information, Version 1.1, pp. 3-1-3-12 (5/97).