[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fmwM_PU9jjXJ5zgeR-0UB4gNAD_KZbZBmLu1TiAHLSYE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-09 05:39:42",968296034,[8,9,10,11],"升高","降低","不变","不确定",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000010882","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff4d118b53baeb8281dde2c07442cb08e.png","[共享课]电子电路实验（浙江大学）","54514696","第六章单元测试","在555时基电路接成的多谐振荡器电路中,当5脚外接控制电压VCO升高时,电路的振荡频率:( )",[20,31,40,49,57],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],968295933,[24,25,26,27],"8V","6V","4V","2V","在如图所示的施密特触发器电路中,当Vcc=12V时,其回差电压ΔVT是多少伏?( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F69ec38de0e11a2e17f5268e8e426a8d6.png\">","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],968295951,[35,36,37,38],"低电平持续时间t大于暂稳态持续时间tw、周期大于暂稳态持续时间tw","低电平持续时间t小于暂稳态持续时间tw、周期大于暂稳态持续时间tw","低电平持续时间t小于暂稳态持续时间tw、周期小于暂稳态持续时间tw","低电平持续时间t大于暂稳态持续时间tw、周期小于暂稳态持续时间tw","在如图所示的单稳态触发器电路中,为使每个输入的低电平脉冲都能有效触发,对输入脉冲的低电平持续时间和周期有何要求?( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9ba13b0da87ec35f32a07167a7096d91.png\">",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],968296004,[44,45,46,47],"5.9KHz","9.3KHz","14KHz","11KHz","在如图所示的多谐振荡器电路中,若R1=R2=5.1KΩ,C=0.01μF,Vcc=12V,这电路的振荡频率是:( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8f538b985137a1fb14547d3d211217de.png\">",{"answer":50,"createTime":5,"id":51,"options":52,"question":56,"source":29,"type":30},[],968296033,[25,53,54,55],"3V","5V","2.5V","在用555时基电路接成的施密特触发器电路中,当Vcc=9V、外接控制电压VCO=5时,其回差电压ΔVT是多少伏?( )",{"answer":58,"createTime":5,"id":6,"options":59,"question":18,"source":29,"type":30},[],[8,9,10,11]]