Title:
MULTIPLICATION DIGITAL/ANALOG CONVERSION CIRCUIT
Document Type and Number:
Japanese Patent JP3228799
Kind Code:
B2
Abstract:
PURPOSE: To simplify the constitution of a multiplication digital/analog conversion circuit applicable to the analog input signal current of either polarity.
CONSTITUTION: In order to make this multiplication digital/analog conversion circuit for generating a digitally weighted current proportional to a voltage which is supplied to an analog input terminal 19 at respective output terminals 3 of a current mirror circuit 1 and switching the currents to the output terminal 9, corresponding to the value of digital signals supplied to a digital input terminal 11 be applicable to the analog input voltage of either polarity to a ground potential and generate a corresponding output current, a bias current is supplied from a current source 15 to the input terminal 2 of the current mirror circuit 1 and a digitally weighted bias current is generated at the output terminal 3 of the current mirror circuit 1. The bias currents are offset by the corresponding bias current, generated at the respective output terminals 6 of a second current mirror circuit 4.
More Like This:
Inventors:
John Barry Hughes
Application Number:
JP29707892A
Publication Date:
November 12, 2001
Filing Date:
November 06, 1992
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H03M1/66; G06J1/00; H03M1/74; (IPC1-7): H03M1/74; H03M1/66
Domestic Patent References:
| JP57178418A | ||||
| JP63290020A | ||||
| JP1212028A | ||||
| JP55163915A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)
Previous Patent: フェースシールド及びフェースシールド用図柄シート
Next Patent: MOTOR CONTROL DEVICE AND MAGNETIC RECORDING/REPRODUCING DEVICE USING THE MOTOR CONTROL DEVICE
Next Patent: MOTOR CONTROL DEVICE AND MAGNETIC RECORDING/REPRODUCING DEVICE USING THE MOTOR CONTROL DEVICE