A first peaking current generating section generates a first peaking current in synchronism with the transitions of a digital signal, being positive at the rising edge and negative at the falling edge. This invention also relates to inbred maize lines derived from inbred maize line PHJ8R, to methods for producing other inbred maize lines derived from inbred maize line PHJ8R and to the inbred maize lines derived by the use of those methods. According to a user-programmable sample rate feature, a user may select to operate the sensor at a fixed, predetermined sample rate or at a user-specified sample rate. The second rotating bodies are rotatably arranged on the receiving chamber sidewall.