Reference voltage generating circuit formed of bipolar transistors
November 16, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBias voltage and constant current supply circuit Bias voltage supplying circuit Temperature-compensated integrated circuit for uniform current generation Bandgap voltage generator Reference generator for generating a reference voltage and a reference current Current-detecting circuit Constant-current source circuit having a MOS transistor passing off-heat current Bidirectional current mirrors and method for bidirectional current conduction Patent #: 5221889 InventorAssigneeApplicationNo. 342008 filed on 11/16/1994US Classes:323/313, To derive a voltage reference (e.g., band gap regulator)323/315Including parallel paths (e.g., current mirror)ExaminersPrimary: Wong, Peter S.Assistant: Berhane, Adolf Attorney, Agent or FirmForeign Patent References
International ClassG05F 003/16Foreign Application Priority Data1992-01-29 JPAbstractA reference voltage generating circuit comprising a first and second transistors whose base-to-emitter voltages are different from each other and a constant current source to drive said respective transistors. Since the base-to-emitter voltages are different from each other, the circuit scarcely has a temperature characteristic with a reduced circuit scale. The first and second transistors preferably have different emitter areas. The current source is preferably a current mirror circuit composed of third and fourth transistors whose emitter areas are different from each other to drive the first and second transistors by different currents.Other References
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