Design Review

Target Audience & Projects

• Hardware teams approaching a first or second prototype without a dedicated precision analog specialist.
• Developers of scientific instrumentation, DAQ systems, laboratory equipment, and precision sensor interfaces.
• Engineering teams dealing with excess noise, thermal drift, unstable ADC codes, slow settling, or discrepancies between simulation and measurement.
• Projects where the cost of a board spin or missed specification is significantly higher than the cost of an independent review.

Technical Coverage

• Sensor front-ends for thermocouples, RTDs, strain gauges, photodiodes, piezo sensors, and high-impedance sources.
• Drivers and buffers for high-resolution ADCs.
• Active and passive anti-aliasing, notch, low-pass, and high-pass filters.
• Voltage-reference circuitry: filtering, buffering, distribution, and dynamic load handling.
• Precision current sources, instrumentation amplifiers, and transimpedance amplifiers.
• PCB regions that directly affect analog noise, stability, reference integrity, return paths, and measurement accuracy.

Common Issues Identified

• MLCC nonlinearities, DC-bias derating, and shifts in filter characteristics.
• Insufficient phase margin, ringing, and incomplete settling in ADC drivers.
• Noise sources that limit effective resolution and dynamic range.
• Incorrect SPICE assumptions, incomplete component models, and unmodeled parasitics.
• Layout risks in voltage references, power delivery, return-current paths, and sensitive analog nodes.
• Thermal drift, tolerance accumulation, common-mode violations, and operating-limit problems.

What You Receive

• A concise executive summary for project leads.
• Critical / Major / Minor findings linked to specific circuits and design decisions.
• Annotated schematic fragments and quantitative calculations where required.
• Concrete recommendations for components, values, topology, and test conditions.
• A validation plan identifying the measurements needed to confirm the revised design.
• One written clarification round within the agreed review scope.

Service Packages

Why prices are listed as "From". Analog design complexity is driven by the number of gain stages, operating modes, performance targets, model availability, and PCB-analysis depth—not simply by component count. After reviewing your materials, we provide a fixed-price Scope of Work. There are no hourly overages within the agreed scope.

What we mean by one signal chain. One continuous functional path from a sensor or input connector to the ADC input or another agreed output node. Shared references, supplies, multiplexers, and multiple operating modes may increase the project scope.

How the Process Works

1. Submit your schematic, requirements, and a short description of the design challenge.
2. We confirm technical fit and, when needed, execute an NDA before full documentation is transferred.
3. Within 1-2 business days after receiving sufficient material, we issue a fixed-price Scope of Work and delivery schedule.
4. After payment according to the proposal, we review the identified design revision.
5. You receive the PDF report and may submit one written clarification round within 10 business days.

What We Need to Start

• Searchable vector PDF of the schematic.
• Input signal range, source type, and source impedance.
• Target bandwidth, sampling rate, and ADC operating mode.
• Required accuracy, noise performance, dynamic range, and settling time.
• Temperature range, supply limits, and component constraints.
• PCB data when layout review is included.

EDA-neutral workflow. Native EDA project files are useful supplementary material but are not required for initial qualification. For PCB analysis, IPC-2581 or ODB++ is preferred; an extended Gerber package may also be accepted. File conversion, schematic reconstruction, and recovery of missing engineering data are quoted separately when required.

See the Review Before You Commit

A demonstration report based on a HighSNR reference design shows the structure, analytical depth, risk classification, and style of recommendations you can expect. It is not derived from client materials.

Review Led by Principal Engineer

Each review is conducted or directly supervised by Boris Kuznetsov. Core engineering analysis is not delegated to anonymous junior reviewers or outsourced without the client's prior written approval.

Confidentiality

We can execute a Non-Disclosure Agreement before you transfer complete documentation. Project materials are accessible only to personnel explicitly assigned to the review. They are not shared with third parties, used for model training, or included in publications, demonstrations, or benchmarks without your written permission. Retention and deletion requirements can be specified in the NDA or Scope of Work.

Scope and Limitations

The service focuses on precision analog and mixed-signal performance. High-current power electronics, RF and microwave design above 100 MHz, antenna design, standalone digital-logic auditing, firmware, FPGA development, and formal metrological certification are outside the primary scope. These areas are considered only when they directly affect the agreed analog signal chain.

The review applies only to the submitted and identified schematic and PCB revision. It is an independent engineering assessment based on the information provided and does not replace prototype testing, formal certification, or laboratory validation. Review of a modified revision is quoted separately unless explicitly included in the Scope of Work.

Frequently Asked Questions

Initial qualification response within 1-2 business days after sufficient material is received.