A method of evaluating at least one parameter of a first capacitor (C 1 ), the method comprising: coupling a number of capacitors in a capacitor network to a common node, the number of capacitors comprising at least three capacitors (C 1 , C 2 , C 3 ); coupling an input of a buffer to the common node, wherein the buffer comprises a transistor in a source follower configuration and wherein the buffer has an output first, applying a first voltage range to the capacitor network for causing a first voltage drop across the first capacitor; while applying the first voltage range, applying a first reference voltage range to the drain of the transistor, wherein the first reference range approximates an expected voltage increase at the common node; and evaluating the at least one parameter in response to the first voltage range; second, applying a second voltage range to the capacitor network for causing a second voltage drop across the first capacitor, the second voltage drop greater than the first voltage drop; while applying the second voltage range, applying a second reference voltage range to a drain of the transistor, wherein the second reference range approximates an expected voltage increase at the common node; and evaluating the at least one parameter in response to the second voltage range at the output of said buffer; and third, while applying a third reference voltage range to a drain of the transistor, the third reference voltage range reduced relative to the second reference voltage range, re-applying the first voltage range to the capacitor network for causing the first voltage drop across the first capacitor; and evaluating the at least one parameter in response to the re-applied first voltage range at the output of said buffer. coupling a number of capacitors in a capacitor network to a common node, the number of capacitors comprising at least three capacitors (C 1 , C 2 , C 3 ); coupling an input of a buffer to the common node, wherein the buffer comprises a transistor in a source follower configuration and wherein the buffer has an output first, applying a first voltage range to the capacitor network for causing a first voltage drop across the first capacitor; while applying the first voltage range, applying a first reference voltage range to the drain of the transistor, wherein the first reference range approximates an expected voltage increase at the common node; and evaluating the at least one parameter in response to the first voltage range; second, applying a second voltage range to the capacitor network for causing a second voltage drop across the first capacitor, the second voltage drop greater than the first voltage drop; while applying the second voltage range, applying a second reference voltage range to a drain of the transistor, wherein the second reference range approximates an expected voltage increase at the common node; and evaluating the at least one parameter in response to the second voltage range at the output of said buffer; and third, while applying a third reference voltage range to a drain of the transistor, the third reference voltage range reduced relative to the second reference voltage range, re-applying the first voltage range to the capacitor network for causing the first voltage drop across the first capacitor; and evaluating the at least one parameter in response to the re-applied first voltage range at the output of said buffer. <EOS>