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Q-BIT.TXT
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1990-07-25
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Q-BIT CORPORATION
Since 1972, Q-bit Corporation has been perfecting the
design and production of high dynamic range RF amplifiers. Today,
we are a well-known supplier of both commercial and military
quality RF amplifiers.
The micro-circuit RF preamplifiers are used in defense
communication systems worldwide, including jet fighter radar
systems and satellite spacecraft. Our preamplifiers are also used
in equipment for cellular telephone systems, naval vessels, and
test laboratories. Thousands of Q-bit low noise preamplifiers are
on cable television towers across the United States and Canada,
operating under severe weather and lightning conditions.
Q-bit amplifiers offer a wide variety of gain, noise
figure, and power output capabilities. The excellent impedance
match and reverse isolation of these amplifiers make them ideal
interfaces for critical filters, mixers, and hybrid/divider
components.
Q-bit Corporation is located in Palm Bay, Florida, in a
18,000 square foot facility. Our hybrid RF amplifiers are
manufactured in an environmentally controlled Class 10,000 Clean
Room to meet the highest quality standards. Various
Qualification/Conformance programs can be performed to satisfy
individual high reliability programs.
Our engineers are continuously producing new designs,
pushing the technology into new areas of high reverse isolation,
improved temperature stability, high efficiency, low operating
voltage, in frequency ranges from 0.3 to 3000 MHz. A GaAs FET
line of microwave amplifiers is now under development. For more
information on any of our products or capabilities, please call
(407) 727-1838, FAX (407) 727-3729, or TWX (510) 959-6357.
POWER FEEDBACK (TM)
New generation technology in wideband RF amplifier design
In system applications, it is desirable for the RF gain
block to display flat gain, linear phase, low noise, low IM
distortion, and a close impedance match over a defined frequency
bandwidth. Q-bit Corporation's Power Feedback techniques combined
with microstrip circuit layout, yield RF amplifiers that approach
these ideal requirements. Instead of voltage or current feedback,
Power Feedback forces the power delivered to the amplifier load to
be proportional to the input power of the amplifier. This results
in wide bandwidth performance displaying improved impedance
matching, reverse isolation, and noise figure over conventional
resistive feedback techniques. VSWR of less than 1.2:1, noise
figures less than 2 dB and single stage isolation greater than 30
dB are typical. RF bandwidths over 1000 MHz have been realized
using power feedback.
The design of Power Feedback amplifiers is covered by U.S. Patent
4,042,887, others pending.
Q - b i t C o r p o r a t i o n
S t a t e m e n t o f C a p a b i l i t i e s
1. GENERAL
Q-bit Corporation maintains a program of full process
control from parts inspection to delivery of finished product.
Each operating department is in conformance to the requirements
specified in the various Federal, DOD, and Military Specifications
applicable to our product line.
2. SALES
Full compliance to the procurement requirements of the
Federal Acquisition Regulation (FAR) is employed by the Sales and
Marketing Department. New product proposals receive a full
technical evaluation and cost analysis before a competitive bid is
submitted to the customer for evaluation. Existing, off-the-shelf
products receive periodic reviews of their manufacturing costs to
insure products are competitively priced.
3. ACCOUNTING
Accounting practices are in full compliance to the
accounting requirements of the FAR and generally accepted
accounting principles. Cost and time accounting for project
management, production, test, and quality functions complies with
the FAR and standard cost accounting practices.
4. DOCUMENTATION
Documentation falls into two general categories each of
which falls under Configuration Control of MIL-STD-481. They are:
A. Formal Process Specifications
B. Formal Drawings for part manufacture and
procurement.
Process Specifications: Process specifications are prepared
using the guidelines of MIL-STD-961. Individual specifications
are prepared in accordance with MIL-STD-490.
Formal Drawings and specifications: These documents are
prepared under DOD-STD-100 and DOD-D-1000 requirements. ANSI
Y14.5 Geometric Tolerancing is accomplished on all critical parts.
5. QUALITY CONTROL
Quality is maintained per MIL-Q-9858. Hybrid Microcircuits
are fabricated and tested per Q-bit product assurance plans that
follow the guide lines of MIL-M-35510, Appendix G and MIL-STD-883.
Q-bit Corporation is actively pursuing certification to MIL-STD-
1772. The required documentation has been submitted and approved.
Formal audit is scheduled in 1989. Sampling procedures comply
with MIL-STD-105.
Modular RF amplifier circuits are prepared per MIL-A-28875
and the certification requirements therein. Testing is per MIL-
STD-202.
6. MANUFACTURING
Manufacturing is under full process control utilizing
formal build travelers and station process specifications. Each
traveler, specification and drawing meets the criteria as
specified for quality and documentation. Modular fabrication is
under a similar configuration control program and fabrication is
per MIL-STD-454.
Hybrid manufacturing capabilities include:
In-plant thin-film etching of up to 2" square(pre-
metallized) alumina and beryllia substrates, with
line and space tolerance of approximately 0.5 mil
and minimum lines and spaces of approximately 2.0
mils.
In-plant thick-film printing and firing of silver
and gold inks and resistor inks. Space and
conductor tolerance is approximately 10 mils and
minimum spaces and widths are approximately 10
mils.
In-plant eutectic die attach and epoxy attachment
capabilities, semi-automatic epoxy dispensing and
pick-and-place, and 0.7 mil and 1.0 mil thermo-
compression bonding.
In-plant resistance welding for round and
rectangular packages.
Laser trimming of thin and thick film resistors to
Q-bit specifications provided by outside
contractors.
ESD control procedures, work places, etc. are
implemented throughout our receiving, inspection,
manufacturing, test and shipping operations.
In-plant computer tracking system capable of
tracking products by individual lot number and
expediting hot lots to meet essential customer
demands.
7. TESTING
All Q-bit Corporation Hybrid TO-8 amplifiers can be
screened to a Q-bit process following the guide lines of MIL-STD-
883, Method 5008 and various qualification programs tailored to
customer source control drawing requirements. Modular RF
amplifiers can be screened and qualified to MIL-A-28875.
7.1 ENVIRONMENTAL TESTING
Environmental testing of amplifiers is controlled by formal
internal procedures. Units are subjected to all testing as
required by the customer through formal Acceptance Test Procedures
(ATP's), or by in-house ATP's which are written for each
amplifier. All environmental testing is performed in accordance
with the following military and commercial specifications:
MIL-STD-202, Test Methods for Electronic and
Electrical Component Parts;
MIL-STD-454, Standard General Requirements for
Electronic Equipment;
MIL-STD-810, Environmental Test Methods;
MIL-STD-883, Test Methods for Microelectronics;
MIL-A-28875, Amplifier, RF and Microwave, Solid
State;
MIL-M-38510, Microcircuits, General
Specifications for;
IEEE-STD-100, Dictionary of Electrical and
Electronic Terms;
MIL-STD-45662, Calibration Systems Requirements;
7.2 ELECTRICAL TEST CAPABILITIES
Electrical RF testing is accomplished using state-of-the-
art RF/microwave test equipment. General test capabilities, at
the time of this report, are:
Vector network analysis from 300 KHz to 3
GHz,including semi-automatic testing for deviation
from linear phase, group delay distortion,
unconditional stability, and other specific
customer requirements. Q-bit uses computer
controlled Hewlett-Packard 8505 and 8753A vector
network analyzers.
Noise figure measurement from 10 MHz to 3 GHz using
Hewlett-Packard 8970A Noise Figure Meters.
Intermodulation distortion testing from 10 Hz to 8
GHz.
Other dynamic measurements such as overload
recovery time and tolerance, spurious output tests,
signal compression, and saturation measurements.
All electrical testing can be performed over the full
military temperature range -55 degrees C to +125 degrees C.
8. SHIPPING
Amplifiers are packed and shipped per the requirements of
MIL-STD-129. Capabilities exist for the processing of materials
that fall under the ESD categories of DOD-STD-1686.
Bar coding of packing labels is accomplished for military
shipments per MIL-STD-129 as shown above.
9. OTHER
Customer requirements are routed to an internal
Specification Review Group whose function is to turn customer
requirements into formal Q-bit Corporation manufacturing, test and
inspection procedures. This group functions to review
specification requirements and requirements of Military Standards
and create the formal documentation to ensure compliance. This
group also is tasked with the preparation of Mean-Time-Between-
Failure analysis (MTBF) per requirements of DOD-HDBK-217.