Invention Grant
- Patent Title: Low-voltage differential signaling (differential signaling) driver circuit and method of enabling and disabling a differential signaling driver circuit
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Application No.: US15035544Application Date: 2013-11-28
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Publication No.: US10601423B2Publication Date: 2020-03-24
- Inventor: Alexey Michailovich Balashov , Andrey Evgenevich Malkov
- Applicant: FREESCALE SEMICONDUCTOR, INC.
- Applicant Address: US TX Austin
- Assignee: NXP USA, INC.
- Current Assignee: NXP USA, INC.
- Current Assignee Address: US TX Austin
- International Application: PCT/RU2013/001067 WO 20131128
- International Announcement: WO2015/080613 WO 20150604
- Main IPC: H03K19/0185
- IPC: H03K19/0185 ; H03K19/003 ; H03F3/45 ; H03F1/02 ; H03F1/22

Abstract:
A Low-Voltage Differential Signaling (differential signaling) driver circuit (10) comprising enable circuitry for enabling and disabling the differential signaling driver circuit (10) in accordance with an control signal is described. The differential signaling driver circuit (10) comprises: a differential output (12, 13) connected or connectable to a differential signaling receiver circuit via a differential transmission line; current control circuitry (14) for driving a signal current through the differential output (12, 13) in accordance with a driver signal; feedback circuitry (16) for driving the current control circuitry (14) to counteract a difference between a common mode voltage of the differential output (12, 13) and a reference voltage from a reference voltage provider; and the enable circuitry (18). The feedback circuitry (16) comprises a common mode node (20) for providing the common mode voltage (Vcm), a reference input (22) connected or connectable to the reference voltage provider, and a feedback input (24). The enable circuitry (18) is arranged to connect the feedback input (24) to the common mode node (20) when the differential signaling driver circuit (10) is in an enabled state and to the reference voltage provider when the differential signaling driver circuit (10) is in a disabled state. A method of enabling (5.1) and disabling (5.2) a Low-Voltage Differential Signaling (differential signaling) driver circuit (10) is also proposed.
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Information query
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