DAC gain compensation for temperature and process variations

Year	Description
2000	Invention patented by Esa Juhani Rantanen on August 14th, 2000. Abstract: A compensation circuit and method cancels transmit digital-to-analog (DAC) gain variations in a wireless communication device. A transmit DAC produces an output current signal I.sub.load load proportional to a reference current I.sub.ref which is inversely proportional to a load resistance R.sub.load whereby the DAC output current signal I.sub.load inversely tracks changes in the load resistance due to manufacturing process and temperature to cancel gain variations. The load resistor R.sub.load and reference resistor R.sub.ref are preferably located on the same IC and made of the same material. The transmit DAC includes a current steering cell which receives the reference current I.sub.ref to produce the output current signal I.sub.load in proportion of the reference current I.sub.ref.
Source: selected by the editor from original sources.

Invention: DAC gain compensation for temperature and process variations