Abstract: A wireless receiver which is used for a digital signal transmission system to wirelessly transmit a digital signal by packetizing and modifying it, selectively sets the shortest arithmetical bit length satisfying a required communication quality when performs demodulation arithmetical processing to demodulate a digital signal to be packet-transmitted, inputs a demodulation arithmetical result by the arithmetical bit length to calculate an error vector magnitude value that is a measure indicating a difference between the arithmetical result and a known ideal result, predicts a bit error rate by using the EVM value as an evaluation criterion, selects an arithmetical bit length by which the bit error rate becomes optimum, and executes the demodulating arithmetical processing by the selected arithmetical bit length.

Abstract: There is disclosed a form document processing apparatus for entry of data described in form documents. The form document processing apparatus includes a main processing section for performing predetermined processing operations for entered form data, and an auxiliary processing section which, upon receipt of a request from the main processing section, performs, in an auxiliary manner, among the processing operations to be performed by the main processing section, a specific processing operation determined by the contents of form data. Therefore, specific processing operations determined by the contents of form data can be performed without a need to develop a program for each type of task.

Abstract: There is disclosed a form document processing apparatus for entry of data described in form documents. The form document processing apparatus includes a main processing section for performing predetermined processing operations for entered form data, and an auxiliary processing section which, upon receipt of a request from the main processing section, performs, in an auxiliary manner, among the processing operations to be performed by the main processing section, a specific processing operation determined by the contents of form data. Therefore, specific processing operations determined by the contents of form data can be performed without a need to develop a program for each type of task.

Abstract: A method of electrochemically etching a silicon substrate of a diaphragm type silicon pressure sensor is described. The etching process is accelerated by applying a positive voltage to, for example, an electrode of a P-type silicon layer of the substrate to be etched while the substrate is in an etchant solution.