dhruv_electro
Advanced Member level 4
Hay can anybody suggest me some idea about following detail
Variable frequency square wave : 50Khz to 200Khz
Step of the variation : 100Hz
Duty cycle : 50%
VPP: 5V.
I have tried using MCU (PIC16F1939). But it cannot give perfect step of 100HZ. Because in MCU there is a "count" which divides system clock by its value. Or in some other word i only count in time domain. And when we convert it in to frequency domain it is not linear.
Here is the example
Say may system clock is 2MHz
if my count is 10 then output freq is 200KHz
when my count is 11 then output freq is 181.8181KHz
when my count is 12 then output freq is 166.66KHz
so f1-f2 is now equal to f2-f3. I need this step equal to 100Hz. Or will you please give me schematic of any VCO?
Please help.
Variable frequency square wave : 50Khz to 200Khz
Step of the variation : 100Hz
Duty cycle : 50%
VPP: 5V.
I have tried using MCU (PIC16F1939). But it cannot give perfect step of 100HZ. Because in MCU there is a "count" which divides system clock by its value. Or in some other word i only count in time domain. And when we convert it in to frequency domain it is not linear.
Here is the example
Say may system clock is 2MHz
if my count is 10 then output freq is 200KHz
when my count is 11 then output freq is 181.8181KHz
when my count is 12 then output freq is 166.66KHz
so f1-f2 is now equal to f2-f3. I need this step equal to 100Hz. Or will you please give me schematic of any VCO?
Please help.