Hello from Linear Systems

Linear Systems · 18th March 2006, 09:55 AM

We make low noise jfets which are used in audio applications, that second source jfets made by Interfet, National, Motorola, Siliconix, and Toshiba. After releasing our LSK170, and the dual version LSK389, we started getting customer input regarding this website. Since our goal is to service both the professional and diy audio markets, we wanted to to provide access to your members to assist in answering questions regarding our current and future products. We welcome your questions and comments.

Sincerely,

Linear Systems
(Linear Integrated Systems)
www.linearsystems.com
diyaudioemails@linearsystems.com

SY · 18th March 2006, 10:52 AM

Greetings and welcome to the forum! We always appreciate non-commercial input from manufacturers; when people want to know how to use your devices or run into problems, it's nice to be able to go right to the source.

I would certainly encourage LS to consider joining our group of advertising vendors; it helps support this totally non-profit forum and has been a great mutual benefit to both vendors and our consumer members, now well over 50,000 strong.

Joe Berry · 18th March 2006, 02:23 PM

Thanks for being here. I have a general application question:

If operated within their power limits, how close to maximum Vds can your devices work without sacrificing performance or reliability? Would a 20-25% derating on this parameter, e.g., a 60V device working with 45-48V drain to source, be considered good practice? If not, what is your rule of thumb?

Linear Systems · 20th March 2006, 11:57 PM

Yes, your derating percentage works fine as a general rule.

In the event that your circuit required a breakdown close to the maximum limit of one of our datasheets, it would be good to test one of the devices to see if the maximum limit listed on the data sheet has some additional margin. While some devices are spec'd the data sheets at the device performance limit, other devices can be spec'd with additional performance available. It varies device to device, supplier to supplier.

Sincerely,

Linear Systems

18th March 2006, 09:55 AM	#1
Linear Systems diyAudio Member Join Date: Mar 2006 Location: Northern California	Hello from Linear Systems We make low noise jfets which are used in audio applications, that second source jfets made by Interfet, National, Motorola, Siliconix, and Toshiba. After releasing our LSK170, and the dual version LSK389, we started getting customer input regarding this website. Since our goal is to service both the professional and diy audio markets, we wanted to to provide access to your members to assist in answering questions regarding our current and future products. We welcome your questions and comments. Sincerely, Linear Systems (Linear Integrated Systems) www.linearsystems.com diyaudioemails@linearsystems.com

18th March 2006, 10:52 AM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Greetings and welcome to the forum! We always appreciate non-commercial input from manufacturers; when people want to know how to use your devices or run into problems, it's nice to be able to go right to the source. I would certainly encourage LS to consider joining our group of advertising vendors; it helps support this totally non-profit forum and has been a great mutual benefit to both vendors and our consumer members, now well over 50,000 strong. __________________ "...we stumble and get up, we are sad, confident, insecure, feel loneliness and joy and love. There is nothing more; but I want nothing more.” - Christopher Hitchens 1949-2011

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18th March 2006, 02:23 PM	#3
Joe Berry diyAudio Member Join Date: Mar 2001 Location: USA	Thanks for being here. I have a general application question: If operated within their power limits, how close to maximum Vds can your devices work without sacrificing performance or reliability? Would a 20-25% derating on this parameter, e.g., a 60V device working with 45-48V drain to source, be considered good practice? If not, what is your rule of thumb?

20th March 2006, 11:57 PM	#4
Linear Systems diyAudio Member Join Date: Mar 2006 Location: Northern California	Yes, your derating percentage works fine as a general rule. In the event that your circuit required a breakdown close to the maximum limit of one of our datasheets, it would be good to test one of the devices to see if the maximum limit listed on the data sheet has some additional margin. While some devices are spec'd the data sheets at the device performance limit, other devices can be spec'd with additional performance available. It varies device to device, supplier to supplier. Sincerely, Linear Systems

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