会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明公开
    • ELECTRONIC APPARATUS COMPRISING A SWITCHING-TYPE OUTPUT STAGE, AND CORRESPONDING CIRCUIT ARRANGEMENT AND METHOD
    • EP3940938A1
    • 2022-01-19
    • EP21183235.7
    • 2021-07-01
    • STMicroelectronics S.r.l.
    • GONANO, Mr. GiovanniRAIMONDI, Mr. Marco
    • H02M1/44H03F3/217H02M7/5395H02M3/04H02M3/24H03K7/08
    • An electronic apparatus (10; 20) comprising a switching-type output power stage (14), in particular of a full-bridge or half-bridge type, which receives on an input of its own a driving signal ( PWM_in; PWM_out ) pulsed between two electrical levels and supplies at output an output power signal ( PWM_pow ),
      said electronic apparatus (10; 20) comprising:
      a modulator circuit (11) which carries out a pulse modulation, in particular a pulse-width modulation (PWM) and is configured for converting a continuous or digital electrical input signal ( Vi ) into an input signal ( PWM_in ) pulsed between two electrical levels, having a mean value proportional to the amplitude of the input signal ( Vi ); and
      a circuit arrangement (17; 27; 37; 37') for controlling saturation of an output signal (Vout) supplied by the switching-type output power stage (14),
      wherein:
      said circuit arrangement comprises a pulse-remodulator circuit (17; 27; 37; 37'), which is set between the output of the modulator circuit (11) and the input of the switching-type output power stage (14) and is configured for supplying on an output of its own, as driving signal ( PWM_out ) to the switching-type output power stage (14), a respective modulated signal ( PWM_out ) pulsed between two electrical levels, said pulse-remodulator circuit (17; 27; 37; 37') being configured for:
      measuring a pulse width ( W in , L in ) as pulse time interval ( W in , L in ) elapsing between two consecutive pulsed-signal edges of the pulsed input signal ( PWM_in ); and
      if said measurement of the pulse width ( W in , L in ) indicates that the latter is below a given minimum value ( W min , L min ), remodulating said pulsed input signal ( PWM_in ), imposing equality between a pulse width ( W out , L out ) of the output pulsed signal ( PWM_out ) and said value of minimum width ( W min , L min ) and imposing equality between a value of modulation index ( D out ) of the output signal ( PWM_out ) and a value of modulation index ( D in ) of the input signal ( PWM_in ), applying a lengthening of the output period ( T out ).