The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
Whenever the frequency of the railio is changed, the synthesizer is programmed into adapt mode. During this mode, the loop filter of the synthesizer is configured to wide band mode for fast locking.
Motorola Inc. May 2000
English (United States)
This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately
50% of the total text.
DUMP VCO TOPOLOGY
the frequency of the railio is changed, the synthesizer is programmed into
this mode, the loop filter of the synthesizer is configured to wide band mode
for fast locking.
the adapt mode (usually about 2.Oms), the Joop fiJter of the synthesizer is
reconfigured to a narrow mode for optimum noise and spurious performance.
During the adapt mode, the control voltage to the VCQ is indeterminate. The
voltage can range from zero to the maximum of 12V.
improper designed VCQ, the VCO may not oscillate at control voltage of zero
volts. Hence the designer has to ensure the start-up of the VCO at this voltage
even though the occurrence is about two ms.
for start up do degrade the performance of the VCO in the area of phase noise
and bandwidth. Trailitionally, optimization for start-up is a lengthy process
with sacrifice in the bandwidth and phase noise performance of the VCO.
OF THE INVENTION
standard VCO topology as shown in Figure I is modified with an adilitional
switching transistor (Q3) on the emitter of the active device. During adapt
mode of the synthesizer, Q3 is turned on which bypassed the emitter resistor R4
and RF for high current operation. The current drain of the VCO is
approximateJy 35ma during thjs mode. The loop gain of the VCO is sufficiently
high to ensure no start-up problem at the control voltage of O Vat this current