公开(公告)号：DE3685546T2

公开(公告)日：1993-01-28

申请号：DE3685546

申请日：1986-10-17

Applicant: IBM

Inventor： CAVALIERE JOSEPH RICHARD ,  CHANG ALBERT YUAN

IPC: H04L5/14

Abstract: A simultaneous bi-directional transceiver is described. The transceiver comprises two circuits (1; 2) which are disposed at opposite ends of an interchip cable (1000). In response to the application of digital data signals to these circuits, they generate a trilevel voltage at the ends of the interchip cable. Then, in each circuit, a first input to a differential amplifier is generated from the trilevel voltage by a level shifter comprising a first diode (T8; T28) and a first constant current sink (T6, R7; T26, R27) and a second input to the differential amplifier is derived from the digital data input signal applied to that circuit by a level shifter comprising a second diode (T7; T27) and a second constant current source (T5, R5; T25, R25). Finally, the transceiver outputs (lines 107, 207) are generated from the differential amplifier outputs.

公开(公告)号：DE3685546D1

公开(公告)日：1992-07-09

申请号：DE3685546

申请日：1986-10-17

Applicant: IBM

Inventor： CAVALIERE JOSEPH RICHARD ,  CHANG ALBERT YUAN

IPC: H04L5/14

Abstract: A simultaneous bi-directional transceiver is described. The transceiver comprises two circuits (1; 2) which are disposed at opposite ends of an interchip cable (1000). In response to the application of digital data signals to these circuits, they generate a trilevel voltage at the ends of the interchip cable. Then, in each circuit, a first input to a differential amplifier is generated from the trilevel voltage by a level shifter comprising a first diode (T8; T28) and a first constant current sink (T6, R7; T26, R27) and a second input to the differential amplifier is derived from the digital data input signal applied to that circuit by a level shifter comprising a second diode (T7; T27) and a second constant current source (T5, R5; T25, R25). Finally, the transceiver outputs (lines 107, 207) are generated from the differential amplifier outputs.

公开(公告)号：DE3066497D1

公开(公告)日：1984-03-15

申请号：DE3066497

申请日：1980-07-31

Applicant: IBM

Inventor： CHANG ALBERT YUAN ,  PANDYA PUNIT JAYAMUKH

IPC: H03K3/286 ,  G11C11/411 ,  H03K3/013 ,  H03K3/288 ,  H03K17/16

Abstract: An improved current switch emitter follower (CSEF) latch has reduced "noise" in the output signal from equal and opposite operation of the output transistors. The improvement resides in dotting the collector resistors of the input transistors in each current switch with a common shift resistor. The dotted collector resistors control the output transistors whereby one turns on and the other turns off with little change in output signal level as clock signals change to the input transistor.