Patent EP0416613A2 successfully refreshed from Google Patents.
EP0416613A2
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EP
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Transmission power control circuit
Assignee: Fujitsu Ltd
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Filing: 1990-09-06
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Granted: —
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Expires: 2010-09-06
Abstract
Abstract A transmission power control circuit comprises a control data table (56) in which digital data of monitor voltage depending on a transmission power level for a plurality of values of transmission frequency and a plurality of values of transmission power are stored, and a D/A converter (62) for converting selected values of the digital data to an analog signal as a reference voltage. The transmission power is controlled so that the monitor voltage becomes equal to the reference voltage.
Inventors
- 👤 Yoshifumi Toda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/36; H04W52/367; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H04W52/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A transmission power control circuit comprising: control data table means (56) for storing digital values of monitor voltage which are output from a power amplifier (28) depending on a transmission power level of the power amplifier (28), for a plurality of values of transmission frequency, control means (10′) for selecting one of said digital values stored in said control data table means (56) in accordance with a specified value of the transmission frequency, and for outputting a selected digital value, D/A conversion means (62) for converting said digital value to an analog signal as a reference voltage, and power control means (46, 48) for controlling an amplification factor of the power amplifier (28) so that the monitor voltage which is output from the power amplifier (28) becomes equal to said reference voltage.
Claim 2
Dependent Claim
132 words
A transmission power control circuit comprising: control data table means (56) for storing digital values of monitor voltage which are output from a power amplifier (28) depending on a transmission power level of the power amplifier (28), for a plurality of values of transmission frequency, control means (10′) for selecting one of said digital values stored in said control data table means (56) in accordance with a specified value of the transmission frequency, and for outputting a selected digital value, D/A conversion means (62) for converting said digital value to an analog signal as a reference voltage, and power control means (46, 48) for controlling an amplification factor of the power amplifier (28) so that the monitor voltage which is output from the power amplifier (28) becomes equal to said reference voltage.
Claim 3
Dependent Claim
60 words
A transmission power control circuit as claimed in claim 1, wherein said control data table means (56) stores said digital values for a plurality of values of transmission frequency, for a plurality of values of transmission power, and said control means (10′) selects in accordance with a specified value of the transmission frequency and specified value of the transmission frequency.
Claim 4
Dependent Claim
80 words
A transmission power control circuit as claimed in claim 2, further comprising A/D conversion means (72) for converting the monitor voltage, which is output from the power amplifier (28), to a digital signal, wherein said control means (10′) sequentially alters the transmission power and the transmission frequency, receives said digital signal from said A/D conversion means (72) for a combination of each transmission power and each transmission frequency, and write each digital data into said control data table means (56).
Claim 5
Dependent Claim
67 words
A transmission power control circuit as claimed in claim 3, further comprising temperature sensing means (74) for sensing the temperature of elements within the power amplifier (28), wherein an output signal of said temperature sensing means (74) is also input to said A/D conversion means (72), and said control means (10′) writes said digital data for a plurality of temperature conditions recognized by the digital temperature signal.
Claim 6
Dependent Claim
54 words
A transmission power control circuit as claimed in claim 1, further comprising a serial/parallel conversion means (58, 60), wherein said control means (10′) serially outputs said selected digital value, and said serial/parallel conversion moanc (58, 60) converts said serial digital value to a parallel signal to be supplied to said D/A conversion means (62).
References Cited (Backward Citations)
No citation records indexed.
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