HSZ Consulting Ltd

Micro-electronic specialists in mixed-signal design & high speed communications

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Andre Szczepanek

Mike Harwood

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Areas of expertise

· Data Communications : Theory and implementation

· Communications/Networking IP architecture, specification & design.

· Electromagnetism & physics

· Token-Ring

· 10Mbps through 400Gbps Ethernet : MAC, PCS & PHY layers

· Backplane Ethernet (802.3ap)

· Ethernet switching

· High speed Serial Buses : SRIO, PCIe, SPI

· On-chip bus architectures

· SerDes (Analogue & Digital)

· Physical Layer Interfaces

· Transmitters/line-drivers  (wire-line)

· Receivers (wire-line)

· High-speed ADCs — up to 12.5GS/s & track & hold circuits

· High speed digital design

· DACs

· Adaptive equalisers

· Voltage regulators

· Bias generators and band-gap references.

· Amplifiers & buffers

· Low-jitter PLLs (LC and ring-oscillator inc PFDs, charge pumps, loop filters and stability)

· DLLS & phase detectors

· Clock distribution

· High-Speed CMOS device matching & offsets

· ESD

· Lab debug & characterisation

· Networking standards development (past member of 802.5, 802.1, 802.12, OIF, PCI ExAS), currently an 802.3 voting member