Analytical expressions of temperature dependencies of magnitude-frequency and phase-frequency characteristics of a HTSC RLC parallel circuit are obtained, where the resistance and inductance are non-linearly depended on the optical signal modulated by the intensity. It is shown that the magnitude-frequency and phase-frequency characteristics of circuits can be controlled by choosing the parameters of the HTSC thin film and optical "pump". (c) 2005 Elsevier B.V. All rights reserved.