公开(公告)号：IT1150382B

公开(公告)日：1986-12-10

申请号：IT4769782

申请日：1982-02-01

Applicant: MOTOROLA INC

Inventor： ULMER RICHARD WALTER ,  WHATLEY ROGER ALAN

IPC: G05F1/56 ,  G05F3/30 ,  H03K3/26 ,  H03F

公开(公告)号：HK103288A

公开(公告)日：1988-12-30

申请号：HK103288

申请日：1988-12-22

Applicant: MOTOROLA INC

Inventor： WHATLEY ROGER ALAN

IPC: G05F3/16

公开(公告)号：IT8247698D0

公开(公告)日：1982-02-01

申请号：IT4769882

申请日：1982-02-01

Applicant: MOTOROLA INC

Inventor： KELLEY STEPHEN HARLOW ,  ULMER RICHARD WALTER ,  WHATLEY ROGER ALAN

IPC: H03F3/34 ,  H03F1/30 ,  H03F

Abstract: A temperature stable bandgap voltage reference source utilizing bipolar transistors biased at different emitter current densities is provided. Switched capacitors are used to input the Vbe and the DELTA Vbe of the transistors (PTC and NTC voltages, respectively,) into an operational amplifier to provide a reference voltage proportional to the sum of the PTC and NTC voltages. Proper selection of the ratio of the switched capacitors renders the reference voltage substantially independent of temperature. In a modified form of the reference, the reference amplifier is implemented by an auto-zeroed operational amplifier which uses switched capacitor techniques and an integrated capacitor to achieve the auto-zeroing function.

公开(公告)号：IT8247697D0

公开(公告)日：1982-02-01

申请号：IT4769782

申请日：1982-02-01

Applicant: MOTOROLA INC

Inventor： ULMER RICHARD WALTER ,  WHATLEY ROGER ALAN

IPC: G05F1/56 ,  G05F3/30 ,  H03K3/26 ,  H03F

公开(公告)号：IT1186660B

公开(公告)日：1987-12-04

申请号：IT4769882

申请日：1982-02-01

Applicant: MOTOROLA INC

Inventor： KELLEY STEPHEN HARLOW ,  ULMER RICHARD WALTER ,  WHATLEY ROGER ALAN

IPC: H03F3/34 ,  H03F1/30 ,  H03F

Abstract: A temperature stable bandgap voltage reference source utilizing bipolar transistors biased at different emitter current densities is provided. Switched capacitors are used to input the Vbe and the DELTA Vbe of the transistors (PTC and NTC voltages, respectively,) into an operational amplifier to provide a reference voltage proportional to the sum of the PTC and NTC voltages. Proper selection of the ratio of the switched capacitors renders the reference voltage substantially independent of temperature. In a modified form of the reference, the reference amplifier is implemented by an auto-zeroed operational amplifier which uses switched capacitor techniques and an integrated capacitor to achieve the auto-zeroing function.

公开(公告)号：DE3174479D1

公开(公告)日：1986-05-28

申请号：DE3174479

申请日：1981-10-23

Applicant: MOTOROLA INC

Inventor： WHATLEY ROGER ALAN

IPC: G05F3/16

公开(公告)号：EP0064513A4

公开(公告)日：1983-03-23

申请号：EP81902994

申请日：1981-10-23

Applicant: MOTOROLA INC

Inventor： WHATLEY ROGER ALAN

IPC: H01L29/94 ,  G05F1/56 ,  G05F3/20 ,  G05F3/24 ,  G05F3/26 ,  G05F3/16

CPC classification number: G05F3/267