Transmission output circuit and mobile communication terminal
First Claim
1. A transmission output circuit characterized by comprising:
- gain control amplification means for varying gain of an input signal in accordance with a gain control signal;
power amplification means for amplifying power of an output signal from said gain control amplification means;
transmission power output level instruction means for specifying a target transmission power output level;
transmission power control data generation means for generating the gain control signal for performing a feed forward control of said gain control amplification means in order that an output signal level of said power amplification means becomes said target transmission power output level;
detection means for obtaining detected signal data by detecting the output signal of said power amplification means;
and judgment means for judging existence of occurrence of trouble in a transmission output system by using said detected signal data from said detection means.
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Accused Products
Abstract
A transmission output circuit can always perform correct transmission power control, and can detect the abnormality of transmission power, which interferes with other users, and part troubles, which cause erroneous transmission. The transmission output circuit includes transmission power control data generation means for generating a gain control signal for performing the feed forward control of gain control amplification means in order that the output signal level of the power amplification means may be a target transmission power output level, detection means for detecting the output signal of the power amplification means to obtain detected signal data, and judgment means for judging the existence of the occurrence of trouble in the transmission output system by using the detected signal data from the detection means.
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Citations
24 Claims
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1. A transmission output circuit characterized by comprising:
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gain control amplification means for varying gain of an input signal in accordance with a gain control signal;
power amplification means for amplifying power of an output signal from said gain control amplification means;
transmission power output level instruction means for specifying a target transmission power output level;
transmission power control data generation means for generating the gain control signal for performing a feed forward control of said gain control amplification means in order that an output signal level of said power amplification means becomes said target transmission power output level;
detection means for obtaining detected signal data by detecting the output signal of said power amplification means;
and judgment means for judging existence of occurrence of trouble in a transmission output system by using said detected signal data from said detection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21, 22, 23, 24)
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10. A transmission output circuit characterized by comprising:
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gain control amplification means for varying gain of an input signal in accordance with a gain control signal;
power amplification means for performing power amplification of an output signal of said gain control amplification means;
detection means for detecting an output signal of said power amplification means to obtain detected signal data;
a detected signal data table in which the detected signal data corresponding to various values of said transmission power output level is written;
a transmission power control data table in which transmission power control data for generating control voltages to be supplied to said gain control amplification means, the control voltages corresponding to various values of said transmission power output level, is written;
detected signal data comparison means for comparing said detected signal data obtained by said detection means with said detected signal data corresponding to said target transmission power output level from said detected signal data table; and
transmission power control data processing means for operating transmission power control data to said target transmission power output level on a basis of present transmission power control data from said transmission power control data table and comparison output data from said detection signal comparison means, where in said transmission power control data processing means outputs transmission power control data relative to said target transmission power output level after applying correction processing so that the comparison output data of said detection signal data comparison means becomes equal or less than a predetermined level. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A transmission output circuit characterized by comprising:
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gain control amplification means for varying gain of an input signal in accordance with a gain control signal;
power amplification means for performing power amplification of an output signal of said gain control amplification means;
transmission power output level instruction means for designating target transmission power output level based on transmission power control data transmitted from an opponent to transmit;
transmission power control data generation means for generating said gain control signal for carrying out a feed forward control of said gain control amplification means so that output signal level of said power amplification means becomes said target transmission power output level;
detection means for obtaining detected signal data by detecting output signal from said power amplification means;
first judgement means for judging whether said detected signal data from said detection means is within a range which becomes maximum transmission power specified value or not;
second judgement means for judging whether said detected signal data from said detection means is within a range which becomes minimum transmission power specified value or not; and
control means for ignoring transmission power control data when it is judged by said first judgement means that said detection signal data is within the range of said maximum transmission power specified value and when said transmission power control data from said transmission side is for further increasing said transmission power output level, and for ignoring transmission power control data when it is judged by said second judgement means that said detection signal data is within the range of said minimum transmission power specified value and when said transmission power control data from said transmission side is for further decreasing said transmission power output level. - View Dependent Claims (20)
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Specification