Abstarct: In this research, a multi-channel logarithmic analyzer has been designed and constructed with the capability to simultaneously measure nuclear events (gamma, neutron, etc.) in mixed fields with both high and low energies. In the context of microdosimetry, where the observation of continuous spectra in the range of 〖10〗^(-2) keV-〖10〗^3 keV is required, the use of a multi-channel logarithmic analyzer is essential and unavoidable. In the spectroscopy of radioactive particles, a portion of the incident radiation energy registered by the detector signifies the production of a signal. This signal is transformed into an appropriate pulse by pre-amplifiers and amplifiers. The height of the generated pulse is proportional to the recorded energy. Multi-channel analyzers organize pulses baxsed on their heights and assign each of them to a counting channel. The height analysis range in these analyzers is on the order of 〖10〗^3 mV. As the energy measurement range increases, the height analysis range also expands, necessitating the development of the analyzer's performance in terms of pulse height analysis. The use of high-voltage amplifiers and block sampling is a novel method employed by the multi-channel logarithmic analyzer, enabling pulse height analysis in the range of 〖10〗^5 millivolts (1×〖10〗^0-1×〖10〗^5 mV). This logarithmic analyzer has a minimum dead time of 51 microseconds, maximum noise of 300 microvolts, and a maximum of 4095 channels usable across six measurement scales. In simultaneous gamma-ray spectroscopy using Am-241 and Co-60 sources and pulses from a pulse generator with an amplitude of 32000 mV, the designed logarithmic analyzer detected all energy peaks, whereas the linear MCA detected only some peaks.