SYNCHRONOUS TYPE SAWWTOOTH WAVE GENERATING CIRCUIT,申请号JP19800002295-传众专利搜索

SYNCHRONOUS TYPE SAWWTOOTH WAVE GENERATING CIRCUIT

申请公布号：JPS55102926(A)

申请号：JP19800002295

申请日期：1980.01.12

申请公布日期：1980.08.06

申请人：

SONY CORP

发明人：OKADA TAKAFUMI;SUMIYA HIROYUKI;IMAYASU TOMONARI;NIIMURA TSUTOMU

分类号：H03K4/50;H03K3/0231;H03K4/501;H03K4/502

主分类号：H03K4/50

摘要：<p>PURPOSE:To keep saw-tooth wave amplitude constant by supplying a synchronizing signal, whose peak value is within a fixed-value range, to the base of a transistor whose collector and emitter are connected to the collector and emitter of one transistor constitution a differential amplifier. CONSTITUTION:Transistor Trs Q1 and Q2 constitute a differential amplifier, current switch Q4 synchronizing with current switch Q3 is provided to the base of TrQ2, and a reference voltage generating circuit generates 1st and 2nd reference voltages by switch Q4. Here, switches Q3 and Q4 are controlled by the output of the differential amplifier to obtain a saw-tooth wave output from capacitor 20. Further, TrQ5 whose collector and emitter are connected to the collector and emitter of TrQ2 is provided and to the base of TrQ5, a synchronizing signal whose peak value is between the 1st and 2nd reference voltage is applied so as to alternate the charging and discharging of capacitor 20, thereby holding saw-tooth wave amplitude constant.</p>