Title:
DRIVER COMPARATOR CIRCUIT AND TEST DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2010/122603
Kind Code:
A1
Abstract:
A first resistor (R1) has a first terminal to which a first voltage (VH') is applied and a second terminal which is connected to an I/O terminal (P1). A second resistor (R2) has a first terminal to which the first voltage (VH') is applied. A tail current source (12) generates a predetermined tail current (Ia'). A current switch (10) receives data (PAT) to be transmitted to a second device (102) and selects the second terminal of the first resistor (R1) or the second terminal of the second resistor (R2) in accordance with the PAT value, so that the selected one is connected to the tail current source (12). A voltage divider circuit (DIV1) includes a third resistor (R3) and a fourth resistor (R4) arranged in series between the second terminal of the first resistor (R1) and the second terminal of the second resistor (R2). A load balancer (LB1) includes a fifth resistor (R5) having a first terminal to which a second voltage (VLB) is applied and a second terminal which is connected to the second terminal of the second resistor (R2).
Inventors:
KOJIMA SHOJI (JP)
Application Number:
PCT/JP2009/001839
Publication Date:
October 28, 2010
Filing Date:
April 22, 2009
Export Citation:
Assignee:
ADVANTEST CORP (JP)
KOJIMA SHOJI (JP)
KOJIMA SHOJI (JP)
International Classes:
H04L5/14; G01R31/28
Foreign References:
| JPS4711702U | 1972-10-12 | |||
| US3725582A | 1973-04-03 | |||
| JPS5276812A | 1977-06-28 | |||
| JPS6042959A | 1985-03-07 | |||
| JPH0823354A | 1996-01-23 | |||
| JP2006023233A | 2006-01-26 |
Attorney, Agent or Firm:
MORISHITA, SAKAKI (JP)
Sakaki Morishita (JP)
Sakaki Morishita (JP)
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