HI-CLOCK ANALOG

Why it is useful

Hi-clock Analog is a product that can increase in performance your low cost CD-Player transforming it in a High end CD Player machine.

The performance of the new generation internal DAC converter of the CD player (using sampling rate up to 96-192Khz) can be reduced due to the presence of jitter in the main clock signal.
The driving clock of DAC (usually from 8Mhz to 40Mhz frequency) is generated from a quartz oscillator inside the CD itself. To optimize the cost, this oscillator is realized using logic gates or internal oscillator circuit inside te DAC itself. 
This last solution can produce noise in the IC itself because supply of the oscillator is the same of the other internal circuit.

In some cases the main clock is derived from other internal clock signal generators from reading circuit. This choice produce a lot of noise in the clock signal due to the servo-motor spike related to te driving electronics.
So every noise, electroagnetical field, power supply variation, and noise can produce clock noise that produce the jitter effect.

The effect of the jitter on the music is recognize like a instable noise in audio band, reduce the detail of the music and the field dimension. 

Hi-Clock resolve the jitter problem producing a pure clock signal with jitter <10ps respect the 250ps of a standard CD circuit.
Easy to install it can be the solution to have a reference machine for your home audio.

More information on jitter


The Project

HiClock Analog  is designed to substitute the internal clock of a CD Player (having a jitter aroung 250ps) with a pure square wave having a very low jitter (<10ps). 
The level of the sqare wave can be adjusted for 5V and the new 3.3V logig and DAC.

The architecture take in account of all the elements that can cause noise and jitter inside a CD-Player.
A quartz oscillator using discrete transistor expecially tuned for every frequency make a low distorsion sinosuidal signal wave.

The PCB is designe to minimize any interference and a special high speed buffer is provided to isolate the oscillar from the DAC circuit.

All the power supplies for oscillator and buffer are separated .The supply circuit use  very low noise and high speed components to give pure power power supply to oscillator and buffer.

The active circuit (oscillator and buffer) is shielded by a metallic case molded direct to PCB to make possible a set-up close the DAC chip. In this way the oscillator itself do not generate electromagnetic noise to the CD Player circuits and do not capt electromagnetic noise from the CD-Player circuits too.
The board can be supplied with CC or AC fromCD-Player internal power supply. 
If not available a special power supply can be provided.

The installation can be easily and quickly , is explained on the manual. For every CD Player must e used the devoted oscillator frequency

In the tweking page is reported the list of the CD players and the model required.

Please refer to our pricelist to choose the right model for your CD-Player