JPS5761310A - Level detecting circuit - Google Patents

Level detecting circuit

Info

Publication number
JPS5761310A
JPS5761310A JP13653680A JP13653680A JPS5761310A JP S5761310 A JPS5761310 A JP S5761310A JP 13653680 A JP13653680 A JP 13653680A JP 13653680 A JP13653680 A JP 13653680A JP S5761310 A JPS5761310 A JP S5761310A
Authority
JP
Japan
Prior art keywords
detecting circuit
resistance
phi
synchronous detecting
trs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13653680A
Other languages
Japanese (ja)
Inventor
Hisao Kuwabara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13653680A priority Critical patent/JPS5761310A/en
Publication of JPS5761310A publication Critical patent/JPS5761310A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
    • H03D13/008—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/28—Modifications of demodulators to reduce effects of temperature variations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0009—Emitter or source coupled transistor pairs or long tail pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0033—Current mirrors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0094—Measures to address temperature induced variations of demodulation
    • H03D2200/0096—Measures to address temperature induced variations of demodulation by stabilising the temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To improve temperature characteristics of a threshold level by externally fitting a resistance element to a level detecting circuit wherein a differential amplifier part and an operational amplifier part are made into a monolithic IC. CONSTITUTION:A PLL synchronous detecting circuit phi consists of a lower differential couple of transistors (TR)Q1 and Q2 and upper differential couples of TRs Q3 and Q4, and Q5 and Q6. The emitters of the TRs Q1 and Q2 are coupled with each other through a resistance R1 and also connected to constant current sources I1 and I2. The output terminal of the synchronous detecting circuit phi is connected to one input terminal of a voltage comparing and switching circuit VCS, the other input terminal of which is connected to a power source Vcc through a diode Q9. Further, an external resistance R2 is connected between the output terminal of the synchronous detecting circuit phi and the voltage source Vcc to prevent temperature variations in threshold level by the resistance R1 and diode Q9 with the temperature coefficient of the resistance R2.
JP13653680A 1980-09-30 1980-09-30 Level detecting circuit Pending JPS5761310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13653680A JPS5761310A (en) 1980-09-30 1980-09-30 Level detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13653680A JPS5761310A (en) 1980-09-30 1980-09-30 Level detecting circuit

Publications (1)

Publication Number Publication Date
JPS5761310A true JPS5761310A (en) 1982-04-13

Family

ID=15177476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13653680A Pending JPS5761310A (en) 1980-09-30 1980-09-30 Level detecting circuit

Country Status (1)

Country Link
JP (1) JPS5761310A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01190791A (en) * 1988-01-26 1989-07-31 Nippon Oil & Fats Co Ltd Fluidity improver for fuel oil
US5659253A (en) * 1994-11-17 1997-08-19 Lucent Technologies Inc. Temperature compensated radio frequency detector circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01190791A (en) * 1988-01-26 1989-07-31 Nippon Oil & Fats Co Ltd Fluidity improver for fuel oil
US5659253A (en) * 1994-11-17 1997-08-19 Lucent Technologies Inc. Temperature compensated radio frequency detector circuit

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