IC693MAR590
IC693MAR590
鑒相器是一個(gè)相位比較裝置,用來檢測(cè)輸入信號(hào)的相位和反饋信號(hào)的相位之間的相位差,并輸出一個(gè)對(duì)應(yīng)兩信號(hào)相差的誤差電壓Ud(t),完成相位差到電壓的變換。
根據(jù)不同用途,鑒相器的要求主要有:鑒相特性形狀;鑒相特性斜率和鑒相靈敏度;高工作頻率;對(duì)輸入信號(hào)的泄漏;鑒相器的門限;鑒相能力。
鑒相器的具體電路很多,利用集成電路技術(shù),單片集成鑒相器主要有:
1.相乘鑒相器:包括雙平衡差分模擬相乘器和電流比率模擬相乘器等
2.門鑒相器:包括或門、異或門、與非門、或非門和異或門,D觸發(fā)器、RS觸發(fā)器等
3.數(shù)字式鑒相器:包括觸發(fā)器型鑒相器和電壓型、電流型數(shù)字式鑒相器等
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