公开(公告)号：JPS6259407A

公开(公告)日：1987-03-16

申请号：JP20884286

申请日：1986-09-04

Applicant: MOTOROLA INC

Inventor： PACE WILSON D ,  WELTY DENNIS L

IPC: H03G3/02 ,  H03G3/00 ,  H03G3/30 ,  H03G3/32 ,  H04B1/44 ,  H04M1/60 ,  H04M9/08

公开(公告)号：DE3683105D1

公开(公告)日：1992-02-06

申请号：DE3683105

申请日：1986-08-07

Applicant: MOTOROLA INC

Inventor： PACE WILSON DAVID ,  WELTY DENNIS L

IPC: H03G3/02 ,  H03G3/00 ,  H03G3/30 ,  H03G3/32 ,  H04B1/44 ,  H04M1/60 ,  H04M9/08

Abstract: A control circuit (l2) for developing a modulated voltage which is proportional to absolute temperature includes a thermal current source (70) for producing current having a predetermined temperature coefficient and current steering circuitry (74, 80) for proportionally steering the current between first and second outputs in response to a direct current bias voltage applied thereto wherein the current at the first output of the current steering circuitry flows through a resistor (76). The resistor is connected between a source of direct current operating potential and the first output of the current steering circuitry whereby the voltage developed thereacross due to the current steered therethrough is proportional to absolute temperature.

公开(公告)号：CA1177986A

公开(公告)日：1984-11-13

申请号：CA408685

申请日：1982-08-04

Applicant: MOTOROLA INC

Inventor： ZOBEL DON W ,  MAIN W ERIC ,  PACE W DAVID ,  WELTY DENNIS L

IPC: H04B1/58 ,  H04B3/03 ,  H04M19/00 ,  H04M7/00

Abstract: BALANCED CURRENT MULTIPLIER CIRCUIT FOR A SUBSCRIBER LOOP INTERFACE CIRCUIT A balanced multiplier circuit for a subscriber loop interface circuit (SLIC) which provides both loop current to a two-wire bidirectional subscriber loop and suppression of longitudinal signals generated at the two-wire loop input to the SLIC while maintaining the midpoint load voltage at half the available power supply voltage applied to the SLIC.

公开(公告)号：SG141893G

公开(公告)日：1994-03-31

申请号：SG141893

申请日：1993-12-31

Applicant: MOTOROLA INC

Inventor： PACE WILSON DAVID ,  WELTY DENNIS L

IPC: H03G3/02 ,  H03G3/00 ,  H03G3/30 ,  H03G3/32 ,  H04B1/44 ,  H04M1/60 ,  H04M9/08

Abstract: A control circuit (l2) for developing a modulated voltage which is proportional to absolute temperature includes a thermal current source (70) for producing current having a predetermined temperature coefficient and current steering circuitry (74, 80) for proportionally steering the current between first and second outputs in response to a direct current bias voltage applied thereto wherein the current at the first output of the current steering circuitry flows through a resistor (76). The resistor is connected between a source of direct current operating potential and the first output of the current steering circuitry whereby the voltage developed thereacross due to the current steered therethrough is proportional to absolute temperature.

公开(公告)号：CA1177985A

公开(公告)日：1984-11-13

申请号：CA408607

申请日：1982-08-03

Applicant: MOTOROLA INC

Inventor： ZOBEL DON W ,  WELTY DENNIS L

IPC: H04B1/58 ,  H04B3/03 ,  H04M19/00 ,  H04Q3/42 ,  H04M7/00

Abstract: ELECTRONIC TERMINATOR CIRCUIT A subscriber loop interface circuit (SLIC) is used as a terminator circuit which is ground referenced for providing signal conversion between a two-wire bidirectional transmission signal path and a pair of two-wire unidirectional transmission signal paths. The SLIC and associated circuitry allows the use of an all electronic circuit to replace bulky transformers generally utilized in telecommunication systems.

公开(公告)号：EP0089350A4

公开(公告)日：1985-06-06

申请号：EP82902779

申请日：1982-08-06

Applicant: MOTOROLA INC

Inventor： ZOBEL DON W ,  WELTY DENNIS L

IPC: H04B1/58 ,  H04B3/03 ,  H04M19/00 ,  H04Q3/42

CPC classification number: H04B1/58 ,  H04M19/005

Abstract: A subscriber loop interface circuit (SLIC)(10) is used in a terminator circuit (100) which is ground referenced for providing signal conversion between a two-wire bidirectional transmission signal path (102, 104) and a pair of two-wire unidirectional transmission signal paths (106, 108). The SLIC and associated circuitry allows the use of an all electronic circuit to replace bulky transformers generally utilized in telecommunication systems.