TRIANGULAR WAVE GENERATION CIRCUIT, MOTOR DRIVER CIRCUIT, POSITIONING DEVICE AND HARD DISK DEVICE USING THE SAME

To provide a triangular wave generation circuit whose wave is synchronized with a clock signal.SOLUTION: An end of a capacitor C11 is grounded. A source current source 502 sources source current ISRC from its output node. A sink current source 504 sinks sink current ISNK from its output node. A firs...

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Bibliographische Detailangaben
1. Verfasser:	SUGIE TAKASHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PULSE TECHNIQUE
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Beschreibung
Zusammenfassung:	To provide a triangular wave generation circuit whose wave is synchronized with a clock signal.SOLUTION: An end of a capacitor C11 is grounded. A source current source 502 sources source current ISRC from its output node. A sink current source 504 sinks sink current ISNK from its output node. A first switch SW1 is connected between the output node of the source current source 502 and the capacitor C11, and a second switch SW2 is connected between the output node of the sink current source 504 and the capacitor C11. An end of a third switch SW3 is connected to the output node of the source current source 502 and the other end receives a low side reference voltage VREFL. An end of a fourth switch SW4 is connected to the output node of the sink current source 504 and the other end receives a high side reference voltage VREFH.SELECTED DRAWING: Figure 1 【課題】クロック信号と同期した三角波発生回路を提供する。【解決手段】キャパシタＣ１１は、一端が接地される。ソース電流源５０２は、その出力ノードからソース電流ＩＳＲＣをソースする。シンク電流源５０４は、その出力ノードからシンク電流ＩＳＮＫをシンクする。第１スイッチＳＷ１は、ソース電流源５０２の出力ノードとキャパシタＣ１１の間に接続され、第２スイッチＳＷ２は、シンク電流源５０４の出力ノードとキャパシタＣ１１の間に接続される。第３スイッチＳＷ３は、一端がソース電流源５０２の出力ノードと接続され、他端に下側基準電圧ＶＲＥＦＬを受ける。第４スイッチＳＷ４は、一端がシンク電流源５０４の出力ノードと接続され、他端に上側基準電圧ＶＲＥＦＨを受ける。【選択図】図１