JPS5733816A - Step system electronic volume - Google Patents

Step system electronic volume

Info

Publication number
JPS5733816A
JPS5733816A JP10847180A JP10847180A JPS5733816A JP S5733816 A JPS5733816 A JP S5733816A JP 10847180 A JP10847180 A JP 10847180A JP 10847180 A JP10847180 A JP 10847180A JP S5733816 A JPS5733816 A JP S5733816A
Authority
JP
Japan
Prior art keywords
circuit
input terminal
resistor
switches
type connection
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.)
Granted
Application number
JP10847180A
Other languages
Japanese (ja)
Other versions
JPH0239131B2 (en
Inventor
Tadao Suzuki
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP10847180A priority Critical patent/JPS5733816A/en
Publication of JPS5733816A publication Critical patent/JPS5733816A/en
Publication of JPH0239131B2 publication Critical patent/JPH0239131B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators

Landscapes

  • Attenuators (AREA)

Abstract

PURPOSE:To decrease the number of circuit elements, and to easily execute the integration, by setting the constant number of elements of the first and second attenuation step circuits so that an impedance value seen from an input terminal becomes constant at all times, and inserting a correcting resistor as necessary. CONSTITUTION:A sound signal input terminal 1 is connected to an input terminal of the first attenuation step circuit 2, and this input terminal is grounded by a series circuit consisting of an electronic control type connection switch 8, an input impedance correcting resistor 9 and resistors 2a-2c. Also, the input terminal of the circuit 2, a connecting point of the resistor 9 and 2b, and a connecting point of the resistor 2b and 2c are connected to electronic type connection switches 3a-3c, respectively, and through these switches 3a-3c is connected the input terminal of the second attenuating circuit 5 to the output terminal of the circuit 2. On this circuit 5 are provided resistors 5a-5h and electronic type connection switches 7a-7h, and the switches 7a-7h are connected to an output terminal 6 of the circuit 5. In this way, the impedance seen from the input terminal 1 is made constant at all times, and the number of circuit elements is decreased.
JP10847180A 1980-08-07 1980-08-07 Step system electronic volume Granted JPS5733816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10847180A JPS5733816A (en) 1980-08-07 1980-08-07 Step system electronic volume

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10847180A JPS5733816A (en) 1980-08-07 1980-08-07 Step system electronic volume

Publications (2)

Publication Number Publication Date
JPS5733816A true JPS5733816A (en) 1982-02-24
JPH0239131B2 JPH0239131B2 (en) 1990-09-04

Family

ID=14485591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10847180A Granted JPS5733816A (en) 1980-08-07 1980-08-07 Step system electronic volume

Country Status (1)

Country Link
JP (1) JPS5733816A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05327376A (en) * 1992-05-20 1993-12-10 Fujitsu Ltd Digital control variable gain circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953360A (en) * 1972-09-26 1974-05-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953360A (en) * 1972-09-26 1974-05-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05327376A (en) * 1992-05-20 1993-12-10 Fujitsu Ltd Digital control variable gain circuit

Also Published As

Publication number Publication date
JPH0239131B2 (en) 1990-09-04

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