实验一 单调谐高频小信号放大器（Experiment a single-tuned high-frequency small signal amplifier）.doc

实验一 单调谐高频小信号放大器（Experiment a single-tuned high-frequency small signal amplifier） The experiment is a single tuned radio frequency amplifier I. experimental purpose 1. Be familiar with electronic components and high frequency circuit experiment boxes. 2. Be familiar with the analysis of amplitude-frequency characteristics of the resonant circuit -- the passband and the selectivity. 3. Be familiar with and understand the dynamic range and testing methods of the amplifier. 4. Be familiar with the influence of the internal resistance and load on the resonant loop, so as to understand the band expansion. 2. Experimental instruments 1. Dual-track oscilloscope ss-7804 2. Sweep frequency instrument PD1250 3. Hf signal generator WY1052 4. Multimeter Lab 1 Iii. Preliminary requirements 1. Review the working principle of resonant circuit. 2. Understand the relationship between voltage amplification multiple, dynamic range, passband and selectivity of resonant amplifier. 3. In the experimental circuit, if the inductance L = 1uh, the loop total capacitance C = 220pf (including the distributed capacitance), the frequency f of the calculating loop center is calculated. Four, the experiment content and the step (a) single-circuit resonance amplifier. 1. The experimental circuit is shown in figure 1-1 (1) connect the circuit as shown in FIG. 1-1 Broken power rewiring) (2) after the connection is checked, the power will be switched on after confirmation. 2. Static measurement Select Re = 1K in the experimental circuit Measure the static work points, calculate and fill in the 1.1 Table 1.1 Real measurement The measured calculation According to VCE, whether V is working in large area The original for VB VE. IC VCE is no * VB, VE is the base and emitter voltage of the triode. 3. Dynamic research (1) the dynamic range of the measuring amplifier Vi ~ VO (at the resonance point) R is equal to 10K, and Re is equal to 1k. The high frequency signal generator is connected to the input circuit