High-Frequency Electronic Circuits Experimental System

Comprising three kinds of instruments, ten experimental modules and the main experimental

apparatus.

1. Frequency

selection circuits

LC parallel resonant circuits, LC series resonant circuits, LC LPF,

ceramic filter and quartz-crystal filter

2.Small signal

freque -selection

amplification

Single-tuned amplification, capacitor coupled double-tuned

amplification, integrated frequency selection amplification and AGC

3. Sine wave

oscillation and VCO

LC oscillation, quartz-crystal oscillation and VCO/LC oscillation

4. AM and

demodulation

AM, DSB, SSB; diode peak envelope detection; triode small-signal

envelope detection analog multiplier synchronous detection

5. FM demodulation (1)

Quadrature detection, PLL frequency demodulation, basic PLL

6. FM demodulation (2)

Double-mistuned slope detector, pulse counter type detection

7. Frequency mixing

and conversion

Double balanced diode mixer, analog multiplying mixer, transistor

frequency conversion

8. High frequency

power amplification

Nonlinear class C amplification, linear wideband amplification,

integrated linear wideband amplification, collector amplitude

modulation

9. Waveforms

conversion

Limiting, DC level shifting, arbitrary waves/square waves

conversion, square wave/pulse waves conversion, square waves/

triangle waves conversion, square waves/saw tooth waves conversion, triangle waves/sine waves conversion.

10. Synthesis

experiment

Amplification for mike and music IC, audio power amplification,

antenna and semiduplex circuits, frequency divider