Exhibit 99.1

Contact:	Uzi Sasson
	Chief Financial Officer
	IXYS Corporation
	3540 Bassett Street
	Santa Clara, California 95054
	(408) 982-0700

IXYS CORPORATION ANNOUNCES RESULTS FOR THE JUNE 30, 2005 QUARTER

SANTA CLARA, CALIF. August 4, 2005 — IXYS Corporation (NASDAQ:SYXI) today released its financial results for its first fiscal quarter ended June 30, 2005.

For the first fiscal quarter ended June 30, 2005, IXYS reported net revenues of $63.3 million, an increase of 5.6% as compared with net revenues of $60.0 million for the same period in the prior fiscal year.

Gross profit was $21.1 million, or 33.4% of net revenues, for the quarter ended June 30, 2005, as compared to gross profit of $17.2 million, or 28.6% of net revenues, for the same quarter in the prior fiscal year.

Net income for the fiscal quarter ending June 30, 2005 was $5.1 million, or $0.14 per diluted share, as compared to a net income of $1.9 million or $0.05 per diluted share, in the same quarter for the prior fiscal year.

“We are pleased to report that, comparing the June 2005 quarter to the June 2004 quarter, we continued to grow the top line and the bottom line. Gross profits grew by 23% and net income grew by 176%. In the June quarter, we saw lower revenues from our consumer products business when compared to the March quarter, and lower than expected revenues in Europe. We have been taking actions to address our revenues in Europe and reduce our overhead there. We enjoyed the benefits of our lean organization and reported a net income of $5.1 million, the second highest profit for any quarter in our history. We continued our cash growth, and stockholders’ equity grew to a record level of $169 million. Our stronger balance sheet allows us to continue to invest in new products and technology, as well as establish a stronger presence in Asia,” commented Dr. Nathan Zommer, Chief Executive Officer.

“The summer months have historically been weak for IXYS,” said Uzi Sasson, Chief Financial Officer. “Therefore, we expect revenues for the September quarter to be relatively flat, or slightly lower, as compared to the June quarter.”

IXYS develops and markets primarily high performance power semiconductors and control ICs that are used in controlling and converting electrical power efficiently in power systems for telecommunication infrastructure, motor drives, medical systems and transportation. IXYS also serves emerging markets with digital and analog ICs that control flat panel displays, medical instruments and telecommunication products.

Safe Harbor Statement

The foregoing press release contains forward-looking statements. Forward-looking statements include those regarding our actions to address revenues and overhead in Europe, the effect of our balance sheet on our investments and on our presence in Asia and our expectations for revenues in the September quarter. Actual results may vary materially from those contained in the forward-looking statements, due to changes in customer delivery schedules, the cancellation of orders, an unanticipated decline in our turns business or an unexpected increase or leveling of our costs, among other things. Further information on other factors that could affect IXYS is detailed and included in IXYS’ Form 10-K for the fiscal year ended March 31, 2005, as filed with the Securities and Exchange Commission. IXYS undertakes no obligation to publicly release the results of any revisions to these forward-looking statements.

Additional information may be obtained by visiting IXYS’ website at http://www.ixys.com, or by contacting the company directly.

IXYS CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands, except share data)
(unaudited)

	June 30,			March 31,
	2005			2005
ASSETS
Current assets:
Cash and cash equivalents	$	70,742		$	58,299
Accounts receivable, net		35,444			41,388
Inventories, net		49,468			51,411
Prepaid expenses		6,983			4,134
Deferred income taxes		6,773			6,649
Total current assets		169,410			161,881
Plant and equipment, net		35,078			27,814
Other assets		26,710			27,409
Deferred income taxes		2,610			2,787
Total assets	$	233,808		$	219,891
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current portion of capitalized lease obligations	$	2,423		$	2,733
Current portion of notes payable to bank		806			0
Accounts payable		11,920			12,962
Accrued expenses and other liabilities		23,587			22,123
Total current liabilities		38,736			37,818
Long term obligations, net of current portion		15,239			4,409
Pension liabilities		11,034			12,387
Total liabilities		65,009			54,614
Common stock, $0.01 par value:
Authorized: 80,000,000 shares; 33,769,763 issued and 33,542,761 outstanding in June 30, 2005 and 33,586,196 issued and 33,359,194 outstanding in March 31, 2005		338			336
Additional paid in capital		153,009			151,820
Notes receivable from stockholders		(124	)		(355	)
Retained earnings		10,631			5,492
Accumulated other comprehensive income		4,945			7,984
Total stockholders’ equity		168,799			165,277
Total liabilities and stockholders’ equity	$	233,808		$	219,891

IXYS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share data)
(unaudited)

	Three Months Ended
	June 30,
	2005		2004
Net revenues	$	63,341	$	59,954
Cost of goods sold		42,196		42,779
Gross profit		21,145		17,175
Operating expenses:
Research, development and engineering		4,156		4,552
Selling, general and administrative		9,257		9,376
Total operating expenses		13,413		13,928
Operating income		7,732		3,247
Other income (expense), net		425		(203	)
Income before income tax provision		8,157		3,044
Income tax provision		3,018		1,181
Net income	$	5,139	$	1,863
Net income per share — basic	$	0.15	$	0.06
Weighted average shares used in per share calculation — basic		33,416		32,952
Net income per share — diluted	$	0.14	$	0.05
Weighted average shares used in per share calculation — diluted		35,985		35,049