how is the inernal clocks of a chip generated?

[samuel]

by what means, i can implement this function.thankyouverymuch.

 

[Thinkie]

Typically you use a external clock and a PLL internally to synthesise the frequency that you want

then use divider or clock gaters to feed the clock to modules

 

[bansalr]

U can use digital frequency synthesizer.

 

[rameshsuthapalli]

Hi,

i under stood u r problem that u want to design the circut which will generate internal clock.
u can done it by somany ways.
1. u can use the Pll to get the generated clock from the external clock.
2. u can use the counter which will give u the requred clock from higher frequency clock.

Regards,
Ramesh.S

 

[sp]

internal oscillator can b created by using ring oscillator, but it is not really reliable.

it has a large variation across voltage and temperature variation..

so normally this internal oscillator is used for block that don't required fast frequency..

tht's my opinion..

sp

 

[tavidu]

if the freq is not high, you can feed clock into your chip by external
if the freq is high, you can your pll, for example, DDR,DDR2

 

[piao]

but when you use the external clock, you need the input buffer to improve the signal shape