Peter Khairolomour is a technical marketing manager with Fairchild Semiconductor, Portland, Maine. He has a BSEE from the University of California, Los Angeles. Email address: Peter.Khairolomour@fairchildsemi.com
3 results found for Peter Khairolomour, displaying items 1 - 3
June 12, 2008[Ideas For Design] Maintain Power-Conversion Efficiency While Saving PCB Space
Designers of portable electronics such as cell phones, portable media players, and GPS devices are always pushing to squeeze every ounce of battery life out of the application. In particular, in the realm of power conversion, engineers aspire to ensure that every coulomb that leaves the battery finds its way to a point-of-load (POL) without being lost or dissipated as heat. The solution is not always straightforward, though, because as in...
April 28, 2005[Ideas For Design] Precision Programmable Current Sources Use Digital Pots
The circuit that's shown in Figure 1 implements a programmable 0- to 20-mA precision current source. The REF192 low-headroom 2.5-V voltage reference (U1) can source up to 30 mA. An AD5280 digital potentiometer (U2) controls the voltage-divider ratio of the reference voltage. U3, an OP1177 op amp, closes the loop by forcing VL = VW. At the digital pot's zero scale, where VWB ≈ 0 V, the voltage across RSET will approach zero and...
March 31, 2005[Ideas For Design] Precision Programmable Current Sources Use Digital Pots
The circuit shown in Figure 1 implements a programmable 0- to 20-mA precision current source. The REF192 low-headroom 2.5-V voltage reference (U1) can source up to 30 mA. An AD5280 digital potentiometer (U2) controls the voltage-divider ratio of the reference voltage. U3, an OP1177 op amp, closes the loop by forcing VL = VW...
