JPS57199337A - Frequency division circuit - Google Patents
Frequency division circuitInfo
- Publication number
- JPS57199337A JPS57199337A JP8519481A JP8519481A JPS57199337A JP S57199337 A JPS57199337 A JP S57199337A JP 8519481 A JP8519481 A JP 8519481A JP 8519481 A JP8519481 A JP 8519481A JP S57199337 A JPS57199337 A JP S57199337A
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency division
- gate
- duty cycle
- clock
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/08—Output circuits
Landscapes
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To obtain a desired odd number frequency division output of 50% duty cycle, by determining the number of stages of a ring counter and the number of inputs of gate deriving OR through a required frequency division number. CONSTITUTION:A gate 2 which derives output OR of (N/2) sets of a N notation ring counter 1, and an FF3 which utilizes the output of the gate 2 as a clear input and utilizes a clock corresponding to the logical NOT of an input clock of the counter 1 as a clock input, are provided, where indicates the Gauss symbol. An odd number frequency division output is obtained with 50% duty cycle. The gate 2 derives output logical sum of consecutive N/2 sets of outputs from QO+Q N/2 -1 out of the output of each stage. Then, the state of ''O'' for[N/2]t1 +(1/2)t1=(N/2)t1 and ''1'' for succeeding (N/2)t1 out of the Nt1 time is repeated ?at an OUT terminal in the period of Nt1. Thus, the frequency division output of 50% duty cycle can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8519481A JPS57199337A (en) | 1981-06-02 | 1981-06-02 | Frequency division circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8519481A JPS57199337A (en) | 1981-06-02 | 1981-06-02 | Frequency division circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57199337A true JPS57199337A (en) | 1982-12-07 |
Family
ID=13851833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8519481A Pending JPS57199337A (en) | 1981-06-02 | 1981-06-02 | Frequency division circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199337A (en) |
-
1981
- 1981-06-02 JP JP8519481A patent/JPS57199337A/en active Pending
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