Electronic circuit with an operating characteristic correcting function
First Claim
1. An operating characteristic correcting apparatus for correcting operating parameters of an electronic circuit, the correcting apparatus and the electronic circuit being formed on a single integrated circuit chip, the correcting apparatus comprising:
- memory means for storing digital actuation data, the digital actuation data (i) being representative only of one output produced by said electronic circuit and (ii) for controlling only the operating parameters of said electronic circuit;
control means for reading said actuation data from said memory means during an operating condition of said electronic circuit; and
adjusting means for adjusting the operating parameters, said adjusting means being actuated by said control means in accordance with the digital actuation data read from said memory means.
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Accused Products
Abstract
A power voltage of a power source circuit is produced by amplifying a threshold voltage difference of an operational amplifier by an amplification factor corresponding to a dividing ratio of a resistance dividing circuit. The power source circuit is integrated on a CMOS substrate together with a computer block. A plurality of analog switches are associated with the resistance dividing circuit to stabilize the power voltage of the power source circuit. One of these switches is selectively closed to change the dividing ratio of the resistance dividing circuit in accordance with actuation data stored in a control register.
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Citations
14 Claims
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1. An operating characteristic correcting apparatus for correcting operating parameters of an electronic circuit, the correcting apparatus and the electronic circuit being formed on a single integrated circuit chip, the correcting apparatus comprising:
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memory means for storing digital actuation data, the digital actuation data (i) being representative only of one output produced by said electronic circuit and (ii) for controlling only the operating parameters of said electronic circuit; control means for reading said actuation data from said memory means during an operating condition of said electronic circuit; and adjusting means for adjusting the operating parameters, said adjusting means being actuated by said control means in accordance with the digital actuation data read from said memory means. - View Dependent Claims (4, 7, 13, 14)
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2. An operating characteristic correcting apparatus for correcting operating parameters of an electronic circuit, the apparatus comprising:
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an adjusting circuit for adjusting operating parameters of said electronic circuit incorporated in an integrated circuit; memory means for storing actuation data of said adjusting circuit determined beforehand for controlling the operating parameters of said electronic circuit; and control means for reading said actuation data from said memory means and actuating said adjusting circuit in accordance with said actuation data to control the operating parameters of said electronic circuit; wherein said electronic circuit is a constant-voltage circuit comprising an operational amplifier utilizing a threshold voltage difference, a resistance dividing circuit, and a voltage-applying switching element applying a direct-current power voltage between both ends of said resistance dividing circuit, said operational amplifier controls said voltage-applying switching element to equalize an electrical potential of a dividing point of said resistance dividing circuit with said threshold voltage difference, so that said direct-current power voltage applied between the both ends of said resistance dividing circuit is equalized with an amplified voltage obtained by amplifying the threshold voltage difference of said operational amplifier by an amplification factor corresponding to a dividing ratio of said resistance dividing circuit, said adjusting circuit comprises a plurality of adjusting switches selectively closed to change the dividing point of said resistance dividing circuit to determine said amplification factor of said constant-voltage circuit, and said control means selectively closes one of said adjusting switches in accordance with said actuation data to determine the dividing ratio of said resistance dividing circuit, thereby producing a controlled direct-current constant voltage from said constant-voltage circuit. - View Dependent Claims (3, 9, 10, 11, 12)
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5. An operating characteristic correcting apparatus for correcting operating parameters of an electronic circuit, the apparatus comprising:
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an adjusting circuit for adjusting operating parameters of said electronic circuit incorporated in an integrated circuit; memory means for storing actuation data of said adjusting circuit determined beforehand for controlling the operating parameters of said electronic circuit; control means for reading said actuation data from said memory means and actuating said adjusting circuit in accordance with said actuation data to control the operating parameters of said electronic circuit; and a temperature sensor for detecting a temperature of said electronic circuit, wherein said actuation data are corrected based on the temperature detected by said temperature sensor and said adjusting circuit is actuated based on the corrected actuation data, so as to eliminate undesirable temperature drift in the operating parameters of said electronic circuit, and said temperature sensor comprises a series circuit consisting of a plurality of MOS-type field effect transistors each having a gate and a drain directly connected, and a voltage applied between both ends of said series circuit, the voltage being equivalent to a sum of threshold voltages of said plurality of MOS-type field effect transistors, is outputted from said temperature sensor as a detection sensor representing the temperature of said electronic circuit.
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6. An operating characteristic correcting apparatus for correcting operating parameters of an electronic circuit, the apparatus comprising:
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an adjusting circuit for adjusting operating parameters of said electronic circuit incorporated in an integrated circuit; memory means for storing actuation data of said adjusting circuit determined beforehand for controlling the operating parameters of said electronic circuit; control means for reading said actuation data from said memory means and actuating said adjusting circuit in accordance with said actuation data to control the operating parameters of said electronic circuit; and a temperature sensor for detecting a temperature of said electronic circuit, wherein said actuation data are corrected based on the temperature detected by said temperature sensor and said adjusting circuit is actuated based on the corrected actuation data, so as to eliminate undesirable temperature drift in the operating parameters of said electronic circuit, said memory means stores (i) temperature data sensed by said temperature sensor when said actuation data are set and (ii) said actuation data, and said control means corrects said actuation data based on the temperature data stored in said memory means and a present temperature sensed by said temperature sensor. - View Dependent Claims (8)
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Specification