NOVELTY - The matching circuit (8) has an input interface (9) for connection of output voltage (US) of fuel cell arrangement (6) of fuel cell system (2). A drive output interface (13) supplies a drive voltage (UA) to a drive motor (5) in power train (3). A supply output interface (10) supplies a supply voltage (UV) to supply bus (11) for peripheral components (12) e.g. compressors, valves, de-moisturizers, moisturizers, fans, so that matching circuit can be switched to a special operating mode in which magnitude of supply voltage is greater than the drive voltage.    USE - Matching circuit for fuel cell system of vehicle.    ADVANTAGE - Provides a matching circuit which is designed with low power conversion components such that output voltage of fuel cell arrangement can be converted to a voltage with minimum amplitude as determined by vehicle requirements, thus ensuring favorable characteristics of fuel cell system even during cold or freezing starting. Ensures operability of peripheral components and enables switching of matching circuit to special operating mode by supplying a supply voltage having predetermined magnitude greater than that of drive voltage. Ensures that drive motor can produce adequate torque at lower drive voltage, preferably at low speeds, by matching supply and drive voltages differently or independently of each other to requirements of respectively associated loads. Requires no bypass since direct current (DC)/DC booster has self-bridging function.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a drive system; and    (2) a method for operating the drive system for vehicle.    DESCRIPTION OF DRAWING(S) - The drawing is a block diagram of the drive system in a vehicle.    Fuel cell system (2)    Power train (3)    Drive motor (5)    Fuel cell arrangement (6)    Matching circuit (8)    Input interface (9)    Supply output interface (10)    Supply bus (11)    Peripheral components (12)    Drive output interface (13)    Drive voltage (UA)    Output voltage (US)    Supply voltage (UV)