TransSiP's Patent-pending Jitter Conditioning Technology

What is "SNJ Conditioning"?

    TransSiP's JC™ jitter conditioning technology and JC-PFM™ DC-DC converter are patent-pending technologies based on TransSiP’s discovery that dislocations in timing of switched-mode DC-DC conversion switching noise, or "switching noise jitter" ("SNJ") become the dominant factor in downstream system performance once the amplitude of switching frequency noise components is attenuated. The presence of SNJ means performance of noise-sensitive circuitry such as spread-spectrum communications transceivers, GNSS/GPS receivers, ADCs, or precision clocks will be sub-optimal or degraded if only switching noise amplitude is attenuated.

 
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    TransSiP's direct observations and field testing have shown that once SNJ is reduced or eliminated, downstream circuit performance is significantly improved and can reach levels which are equivalent to if not better than the linear (commonly known as “low drop-out” or “LDO”) regulators considered the “de facto” standard for noise-sensitive applications, opening the door for new levels of functionality and autonomy for power-constrained systems.

 

What is "Jitter"?

    Supply bias switching noise jitter differs from the jitter known as time interval error ("TIE"), period jitter, or other familiar jitter parameters used to measure signal quality in high speed digital systems. The definition or integrity of the voltage transition which forms the digital pulse is impacted by transmitter bandwidth, power distribution network ringing and noise, EMI coupling to data or clock signal lines, transmission media, impedance variations and termination, and physical media discontinuities. The net result is a loss of signal definition and closing of the "eye" as signal quality degrades.

    In contrast, supply bias jitter consists of variations in the timing of switched-mode DC-DC power supply output ripple voltage.

    As a consequence, although it is much more efficient than LDO, designers have avoided switching-mode DC-DC conversion in portable applications because of the problems of non-linear efficiency and noise. Functional specifications for wireless and navigation/positioning components and subsystems assume noise-free operating conditions, and since this is not the case in the real world the generally accepted approach is to use LDO regulation/conversion at the cost of reduced battery life and generally expected sub-optimal performance.
   

 
 
 
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    In short, a satisfactory solution to the problem of DC-DC conversion in power-constrained applications hasn't been found. Until now.