JPS6477222A - I2l integrated circuit - Google Patents
I2l integrated circuitInfo
- Publication number
- JPS6477222A JPS6477222A JP62232195A JP23219587A JPS6477222A JP S6477222 A JPS6477222 A JP S6477222A JP 62232195 A JP62232195 A JP 62232195A JP 23219587 A JP23219587 A JP 23219587A JP S6477222 A JPS6477222 A JP S6477222A
- Authority
- JP
- Japan
- Prior art keywords
- current
- circuit
- pnp
- amplification factor
- constitute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Bipolar Integrated Circuits (AREA)
- Logic Circuits (AREA)
Abstract
PURPOSE:To improve reliability by directly feeding back the change of characteristic of an I<2>L element due to secular change to an injector current to automatically compensate the degradation in current amplification factor of the I<2>L element with respect to a varying means of the injector current. CONSTITUTION:Transistors TRs Q1 and Q2 and TRs Q4 and Q5 constitute current mirror circuits, and the bias of a TR Q3 is determined by diodes D1 and D2 and a resistance R1. Since a grounded base current amplification factor alphaP of the pnp TR Q3 having the same structure as the lateral pnp TR part of an I<2>L element circuit 6 is 0.5, the emitter area of the TR Q1 is set to a value twice as large as that of the TR Q2 to approximately equalize a current IE of the TR Q3 to a current I0 from a constant current circuit 1. The current IE of the TR Q3 is increased or decreased by amplifying circuit 5 in accordance with the number of elements of the I<2>L circuit 6 to be controlled. The pnp TR is connected in parallel to the TR Q5 for current mirror to constitute the current amplifying circuit 5 keeping a certain degree (n) of amplification independently of the current level, and the constant current circuit which is controlled by the current amplification factor of the TR Q3 is provided. Thus, a high- reliability circuit is formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232195A JPS6477222A (en) | 1987-09-18 | 1987-09-18 | I2l integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232195A JPS6477222A (en) | 1987-09-18 | 1987-09-18 | I2l integrated circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477222A true JPS6477222A (en) | 1989-03-23 |
Family
ID=16935482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62232195A Pending JPS6477222A (en) | 1987-09-18 | 1987-09-18 | I2l integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477222A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010041449A (en) * | 2008-08-06 | 2010-02-18 | Nec Electronics Corp | Oscillation circuit |
US7679467B2 (en) | 2005-03-02 | 2010-03-16 | Oki Semiconductor Co., Ltd. | Voltage controlled oscillator |
-
1987
- 1987-09-18 JP JP62232195A patent/JPS6477222A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7679467B2 (en) | 2005-03-02 | 2010-03-16 | Oki Semiconductor Co., Ltd. | Voltage controlled oscillator |
JP2010041449A (en) * | 2008-08-06 | 2010-02-18 | Nec Electronics Corp | Oscillation circuit |
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