Invention Grant
- Patent Title: System and method of digitally testing an analog driver circuit
- Patent Title (中): 数字测试模拟驱动电路的系统和方法
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Application No.: US12189226Application Date: 2008-08-11
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Publication No.: US07659740B2Publication Date: 2010-02-09
- Inventor: Joseph O. Marsh , Jeremy Stephens , Charlie C. Hwang , James S. Mason , Huihao Xu , Matthew B. Baecher , Thomas J. Bardsley , Mark R. Taylor
- Applicant: Joseph O. Marsh , Jeremy Stephens , Charlie C. Hwang , James S. Mason , Huihao Xu , Matthew B. Baecher , Thomas J. Bardsley , Mark R. Taylor
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Ian D. MacKinnon
- Main IPC: G01R31/02
- IPC: G01R31/02 ; G01R31/26

Abstract:
Digital testing of an analog driver circuit is enabled using a circuit including a control circuit for generating signals, a differential driver circuit for receiving a differential input signal, amplifying the differential input signal and transmitting a differential output signal, a programmable termination impedance circuit for generating a differential termination impedance at the output node of the differential driver circuit, and a differential receiver circuit for converting the differential output signal to a single ended signal and transmitting the single ended signal. The testing includes skewing a differential output termination impedance, adjusting a differential receiver circuit voltage offset, selecting a differential driver circuit power level, enabling a decoder which activates only one differential driver circuit segment per test sequence, activating a segment, stimulating the differential driver circuit with digital test patterns, receiving differential driver circuit output, converting the output to a single-ended signal, and observing the single-ended signal.
Public/Granted literature
- US20090027075A1 System And Method of Digitally Testing An Analog Driver Circuit Public/Granted day:2009-01-29
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