Electronics Forum / Design / July 2008

Hi, there, back again.
Anybody could provide some online switch mode adjustable current
source design notes? I prefer buck configuration, > 8A reference
design.

Hi there - I need to combine together 3 lithium polymer battery packs.
Each battery pack is a 4 cell (in series) pack, so the voltage of each
pack could be as high as say around 18V, and I can't let it fall below
12V otherwise damage to the pack could occur. Once the battery pack is

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GENERAL DESCRIPTION(Am27C128-70DCB datasheet and pdf download)
The Am27C128 is a 128-Kbit, ultraviolet erasable programmable read-
only memory. It is organized as 16
Kwords by 8 bits per word, operates from a single +5 V supply, has a

I'm about to leave the salaried workforce and become a consultant. I realize
that I'll now be paying my own Social Security/Medicare taxes directly
(along with fed/state income tax).
Do I need any type of business license since I will now be self employed?

I am trying to find a paper by RD Middlebrook.
It is listed in one bibliography as
R. D. Middlebrook, “Topics in multiple-loop regulators and currentmode
programming,’’ in IEEE Power Electronics Specialists Con$

Ok, guys, I don't use Spice much and usually get around this stuff via
some extra placed parts. Not this time.
How can one calculate the (running) average of a trace? IOW as if there
was an RC or LC lowpass. Or something where I can set a scooting window.

We're looking for a PNP transistor capable of dissipating about a watt
(in some air flow) and that has low output capacitance, where Co
includes the mounting as well as the part itself. This is for use as a
current source in a 1 GHz bandwidth driver circuit.

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We are using the USB1T11AM USB transceiver together with the USB Host
(USB 1.1) controller of the MPC8270 processor. The OS is Linux 2.4.
We can detect and enumerate a USB 1.1 Storage device, but when we
connect an USB 2.0 Storage device there is a failure, the device is

DESCRIPTION
The TK112xxB is a low dropout linear regulator with a built-in
electronic switch.  The internal switch can be controlled by TTL or
CMOS logic levels.  The device is in the "on" state when the control

Here is what I have: high power pulses (I~25A=constant, V~50-80V, t
=300us, rep. rate=100Hz; the pulses come in bursts, long term average
power is low). Input voltage is 10V.
Flyback converter is working fine recharging energy storing capacitor

Last Call for Papers (extended): International Conference on Circuits
and Systems ICCS 2008
From: International Association of Engineers (IAENG)
San Francisco, USA, 22-24 October, 2008

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