It is convenient to adjust the circuit and easy to acquire sensitive signal by using this method , and there is not the impedance mismatching problem met in bridge - based self - sensing circuit 該方法使得自感知電路的調(diào)節(jié)和感知信號的獲取變得容易,克服了電橋法自感知電路阻抗不易匹配的不足。
3 . the sensing circuit tuning fork micromechanical gyroscope is designed . as for the detecting circuit of the capacitances , the " charge sense " circuit are improved , and the detecting bridge is designed 電容檢測電路采用電荷放大器方案,并且對其進行了改進;對電容檢測電路的輸出信號進行了分析,設(shè)計了信號檢測電路,有效的分離出了輸入角速度。
It is based on umc 0 . 6 m bcd process . a built - in power mosfet with low on - resistance and a lossless current sensing circuit on chip provide fast and precise current mode control . furthermore , the whole losses decrease and high efficiency up to 90 % can be obtained 它采用umc0 . 6 mbcd工藝制程,利用內(nèi)置的低導通電阻功率mosfet和內(nèi)置的無損耗電流感應(yīng)電路實現(xiàn)了快速精確的電流模式控制,同時也降低了功耗,提高了轉(zhuǎn)換效率,典型的效率可達90 % 。
According to the research of the performances of various temperature sensors , this paper designed a new duty cycle modulated digital thermometer configuration of low power consumption , which includes temperature sensing circuit , first - order - modulate circuit and digital duty cycle measuring circuit 通過對各類集成溫度傳感器性能和特點的研究,設(shè)計了新的低功耗占空比調(diào)制型數(shù)字體溫計電路,包括溫度傳感電路、一階-調(diào)制電路和數(shù)字占空比檢測電路。
The temperature sensing circuit adopts current - output mode taking pnp substrate transistor as temperature sensing device . according to the theory of the bgr , ptat and ctat can be generated from the circuit , and the former one is regarded as the initial signal which correlating to the temperature 溫度傳感電路以襯底pnp型bjt作為感溫元件,采用電流輸出模式,按照帶隙基準原理獲得與絕對溫度成正比( ptat )電流以及與絕對溫度成反比( ctat )電流,并以前者作為與溫度相關(guān)的原始電信號。
On the one hand , the design uses low voltage cascode op framework to improve its gain ; on the other hand , it applies self - bias and cascode structure to the whole sensing circuit . by using the improved method , we have successfully obtained low power consumption , low offset , high linear and high psrr ptat current generator under low power supply 在電路設(shè)計上一方面改進運放結(jié)構(gòu),采用低壓共源共柵結(jié)構(gòu)以提高其增益,另一方面整體傳感電路采用自偏置結(jié)構(gòu)和共源共柵電流鏡結(jié)構(gòu),在低電源電壓下成功設(shè)計了低功耗、低失調(diào)、高線性度和高電源電壓抑制比的ptat電流產(chǎn)生電路。