发明名称 AMPLIFYING TYPE SURFACE WAVE RECEIVER
摘要 PURPOSE: To amplify and detect a higher harmonic of twice the frequency of a reference wave by forming a conductive channel on the surface of a base and connecting a series circuit consisting of a power supply and an AC detector to contact electrodes arranged on the upper surface of the base at an interval >=λ. CONSTITUTION: The conductive channel 7 is formed on the surface of the base 8 consisting of a material (e.g. GaAs) indicating a piezo-electric effect and capable of obtaining a conductive state by local doping and the contact electrodes 3 are arranged on the surface of the base 8 at the interval more than the wavelengthλof a surface wave. The surface wave device modulates the conductance of the channel 7 by generated piezo-electric charge and a change corresponding to the higher harmonic of twice the frequency of the reference wave is detected by the AC detector 2 connected to one of the electrodes 3 through the power supply and directly connected to the other. Since the piezo-electric charge acts as gate charge similarly to an FET, a signal passed through the device is amplified and extracted.
申请公布号 JPH01115208(A) 申请公布日期 1989.05.08
申请号 JP19880245828 申请日期 1988.09.28
申请人 SIEMENS AG 发明人 HERUMUUTO SHINKU
分类号 H03H9/25;H03B19/00;H03H3/08 主分类号 H03H9/25
代理机构 代理人
主权项
地址