1, And designed shaping circuit composed of retardation voltage comparison after comparing characteristics of simple voltage comparison and retardation voltage comparison.

2, The generator is composed of input shaping circuit, frequency divider circuit, numeric switch phrase shifter circuit, delay second formation circuit, local second formation circuit and so on.

3, A sine - shaping circuit converts the oscillator triangle wave into a low - distortion sine wave with constant amplitude.

4, And voltage comparator with retardation has been chosen as the shaping circuit to minish undesired signal and to improve the sensitivity of circuit.

5, A device for automatic counting and data reduction is introduced. This device consists of a semiconductor detector, a charge sensitive amplifier,[http:///shaping circuit.html] a pulse shaping circuit and a microcomputer.

6, Based on step recovery diode, a pulse fast edge shaping circuit is realized.

7, A hybrid circuit consists of charge sensitive preamplifier, main amplifier, discriminator and shaping circuit was described.

8, Some contents in the paper have reference value for frequency shaping circuit in seismic data acquisition system.

9, Receiver including the high-frequency amplifier, mixer circuit, demodulation circuit, shaping circuit and decoding circuit.

10, Some contents in the paper have reference value for frequency shaping circuit in seismic data system.