差分二极管 meaning in English

difference diode

The voltage - controlled oscillator and the dual - modulus prescaler are the most crucial blocks in the pll frequency synthesizer . two kinds of voltage - controlled oscillator ( the quadrature voltage - controlled oscillator based on symmetrical spiral inductors and differential varactors , and the voltage - controlled oscillator with wide tuning range based on mos varactors ) and two kinds of prescaler ( the prescaler using phase - switching techniques , and the prescaler using dynamic circuit techniques ) are proposed . then , the complete pll frequency synthesizer is implemented , in which
压控振荡器和双模预分频器是锁相环型频率合成器中最关键的两个模块，本论文分别实现了两种类型的压控振荡器（采用对称螺旋型电感和差分二极管型容抗管的正交压控振荡器和使用mos型容抗管的大调谐范围压控振荡器）和两种类型的双模预分频器（使用相位开关技术的双模预分频器和使用动态电路技术的双模预分频器）。