The Cold-Electron Bolometer (CEB), representing SINIS structure with a hybrid superconductor/ ferromagnetic (S/F) absorber, is the promising candidate for receiving systems of LSPE mission, LSPE is devoted to measuring B-modes in the cosmic microwave background in a night Arctic stratospheric flight. One of the advantages of the CEB is the effective electron cooling [1] due to the S/F absorber and normal metal traps. This allows building effective photon-noise limited receiving systems with ultimate sensitivity [2]. Due to its small size, the CEB can be effectively used to create multichroic elements for actual tasks in submillimeter astronomy due to the benefit from its ability to use co-located data [3]. According to the requirements, a receiving system of the LSPE telescope has a main frequency channel at 145 GHz for CMB measurements and two auxiliary channels of 210 and 240 GHz for cosmic dust measurements. For the moment, the basic concept of 210/240 channels is based on separate horns with TES for each frequency. Replacement of this system by a multichroic system with CEBs receiving both frequencies on-chip would improve the accuracy of co-located difference measurements of the cosmic dust. For voltage-biased operation with a SQUID readout, the parallel arrays of about 200 dipole antennas on a 280 um Si substrate were selected. Each antenna contains a CEB as a sensitive sensor. Each array is selective to its own frequency, allowing combining the two frequency systems in one pixel. The waveguide port is located on the front side. The backside of the substrate has a thin gold layer as a backshort. Simulation results showed good band separation and response at 210 and 240 GHz frequencies with the bandwidths of 13 and 19 GHz, and efficiency of 33 and 53%, respectively. The 145 GHz channel has a bandwidth of around 40 GHz, which is close to the requirements. The major challenge was to find the proper parameter range, where the NEP of the receiver can approach the photon NEP of the receiving signal with 6 pW power and 10 pA/Hz1/2 SQUID noise. Detail investigations showed the impossibility of finding proper parameters for a standard CEB with two SIN tunnel junctions giving NEPCEB five times more than NEPphot. These requirements can be met only with the CEB with one SIN junction and an Andreev contact (SINS structure) [4] instead of the SINIS structure. Replacement of two junctions connected in series by one junction increases responsivity by a factor of two. Replacement of two series capacitances by one decreases a volume of an absorber by a factor of four, leading to the value of V=0.008 μm3. For tunnel junctions with these parameters, the resistance of R=300 Ohm and the critical temperature of 1.5 K, it is possible to get NEPCEB close to NEPphot=5*10-17 W/Hz1/2.