| 摘要 |
<p>1433581 Measuring root mean square values TEKTRONIX Inc 22 Jan 1974 [13 Feb 1973] 02885/74 Heading G1U The true r.m.s. value of an input signal e i is found by producing two currents i 4 , i 5 proportional to the magnitude of e i , multiplying them and producing a product signal i 1 which is also inversely proportional to a feedback current i 6 which equals the average of the product signal i 1 . The current i 6 is converted to a D.C. voltage e o proportional to the r.m.s. value. It is shown that i 6 =K.(e in 2/i 6 ) average , and that thus i 6 K'#(e in <SP>2</SP>) average.</p> |
