is ah advantage that the sensitivity to restrain the variation of the output voltage vo can be improved compared with the circuit shown in fig1 and the temperature characteristics can be improved as well the present disclosure is not limited to the aforementioned exemplary embodiments and various modifications are possible for example several exemplary modifications are described below a the circuit configuration for the case in which the input voltage vi and the output voltage vo are positive is shown however in a case where the input voltage vi and the output voltage vo are negative the same configuration is possible by reversing the transistor conductive type for example using a pnp type instead of an npn type b the component depicted as the diode connected npn 7 is not limited to a single npn transistor and embodiments may include a plurality of serially connected npns 7 corresponding to a required output voltage vo c a phase compensation circuit for preventing oscillation such as the capacitor 11 and the resistor 12 can be added as heeded following from the above description and invention summaries it should be apparent to persons of ordinary skill in the art that while the systems herein described constitute exemplary embodiments it is to be understood that this disclosure is not limited to the above precise embodiments and that changes may be made without departing from the scope of the claims likewise it is to be understood that the invention is defined by the claims and it is not necessary to meet any or all of the identified advantages or objects of the invention disclosed herein in order to fall within the scope of the claims since inherent.