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276K 1.44v 74 40 6.406K .467v 23 You need the chart because the thermistor isn’t linear, so the software needs to know what ADC value to expect for a given temperature. If this were a real application, we would probably calculate the chart in 1-degree incre- ments. For this specific example, the opamp has to swing almost all the way between 5v and ground, so it either needs to operate from positive and neg- ative voltages, or else a single-supply, 5v-only opamp with rail-to-rail output capability would be needed. The accuracy of this circuit is (227 - 23)/30°C = 6.8 ADC steps per °C. Tolerance Stackup In any opamp application, there are gain variations caused by the tolerances of the components. In the thermistor scaling application we just looked at, 54 Analog Interfacing to Embedded Microprocessors
was occurring all over again. ■ THE PATH TO FORGIVENESS The way you forgive is simple. Each time you think of the other person, you use the Law of Substitution and say, “God bless him/her; I forgive him/her for everything, and I wish him/her well.” It is not possible to bless and forgive another person and simultane- ously be angry or upset. The positive thought cancels out the neg- ative thought. You can speed up the process of personal liberation by accept- ing responsibility for your share of what happened. Very few nega- tive events that lead to anger and resentment occur in a vacuum. Almost invariably, you did something to contribute to the situa- tion.You therefore need to have the maturity to take your share of the responsibility. You can then say, “I am responsible
can increase to over 42 °C during the first tender than those from Duroc/Landrace- 45–60 minutes postmortem. At this tempera- and Pietrain-sired pigs. Brewer et al. (2002) ture, a rapid pH decline can result in denatur- reported similar effects on “texture” of ation of myofibrillar proteins such that WHC chops from Halothane positive (nn) and neg- is ultimately quite low, even if ultimate pH ative (NN) Pietrain, RN- Hampshire, rn+ (24 h) is within normal ranges. Rapid post- Hampshire, Berkshire, and Duroc lines of mortem glycolysis is associated with the high pigs. 32 Chapter 2 Hambrecht et al. (2005) reported that high of biohydrogenation of dietary lipids, or via stress conditions (long transport, short endogenous synthesis. Increased marbling, lairage) decreased muscle glycolytic poten- because of the increased amount of fat avail-
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