CHANNEL SELECTION DISPLAY SYSTEM BY STEPPING MOTOR
PROBLEM TO BE SOLVED: To provide a highly reliable analog channel selection display system in which the mechanism section has no deterioration.SOLUTION: When a user turns the switch of a receiver ON, the receiver read the channel selection information of previous time from a memory stored in a micro...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a highly reliable analog channel selection display system in which the mechanism section has no deterioration.SOLUTION: When a user turns the switch of a receiver ON, the receiver read the channel selection information of previous time from a memory stored in a microcomputer, and the microcomputer controls a synthesizer tuner to output sound from a speaker. When the user switches the frequency from AM to FM, a channel selection memory mechanism works to read the information selected by FM previous time, and the microcomputer controls both synthesizer tuner and stepping motor mechanism so as to select that channel. Every time when a dial is moved one stage, the stepping motor goes on one step, and the channel selection frequency increases 9 KHz at a time for AM, and 100 KHz at a time for FM.SELECTED DRAWING: Figure 3
【課題】機構部分の劣化のない高信頼性のアナログ選局表示システムを提供する。【解決手段】ユーザが受信機のスイッチを入れると受信機は前回選局した情報をマイコンに蓄積されたメモリから読み出し、マイコンがシンセサイザーチューナーを制御してスピーカから音を出す。次にユーザが周波数をAMからFMに切り換えると、選局メモリ機構が働き、前回FMで選局した情報を読み出しそのチャンネルを選局するようマイコンがシンセサイザーチューナとステッピングモータ機構の両方を制御する。ダイヤルを1段階動かす毎にステッピングモータが一ステップ進み、それに応じてAM選局であれば選局周波数は9KHzずつ増加し、FMであれば100KHzずつ増加する。【選択図】図3 |
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