Title:
CONNECTION DRIVE/ADDITION CIRCUIT FOR INTER-LINE DIFFERENTIAL AMPLIFIER
Document Type and Number:
Japanese Patent JP3520106
Kind Code:
B2
Abstract:
PURPOSE: To easily provide an improved type operational amplifier, capable of obtaining a high gain without using an intermediate gain stage at low cost.
CONSTITUTION: This connection drive/addition circuit for the inter-line operation of a differential amplifier is provided with differential amplifier input stages Q11-Q14 for amplifying input signals and a current control circuit Q15 for controlling an operation current, flowing to the active element of the differential amplifier input stages. Then, addition circuits QS1-QS8 divided into first and second groups and supplied with a current respectively from a single common floating current source 15 mutually connect an internal current supplied from the differential amplifier input stages, AB-class drive/output stages QD1-QD8/QO1-QO8 operated over almost the entire inter-line power supply voltage range are connected to the addition circuits, and at least single output signal for indicating the input signal is extracted.
Inventors:
Huijsing, Johan H.
Tero, John P.
Tero, John P.
Application Number:
JP5042094A
Publication Date:
April 19, 2004
Filing Date:
March 22, 1994
Export Citation:
Assignee:
PHILIPS ELECTRON NV
International Classes:
G06G7/12; H03F3/30; H03F3/345; H03F3/45; (IPC1-7): H03F3/45; G06G7/12; H03F3/345
Other References:
ＷＥＮ−ＣＨＵＮＧ Ｓ．ＷＵ ＥＴ ＡＬ，Ａ ｄｉｇｉｔａｌ ｐｒｏｃｅｓｓ ｃｏｍｐａｔｉｂｌｅ ｈｉｇｈ−ｄｒｉｖｅ ＣＭＯＳ ｏｐ ａｍｐ ｗｉｔｈ ａ ｒａｉｌ−ｔｏ−ｒａｉｌ ｉｎｐｕｔ ａｎｄ ｏｕｔｐｕｔ ，Ｐｒｏｃｅｅｄｉｎｇｓ ｏｆ ｔｈｅ ３３ｒｄ Ｍｉｄｗｅｓｔ Ｓｙｍｐｏｓｉｕｍ ｏｎ Ｃｉｒｃｕｉｔｓ ａｎｄ Ｓｙｓｔｅｍｓ，米国，１９９０年 ８月１２日，６９２−６９５
Attorney, Agent or Firm:
杉村 興作