PURPOSE: To easily adjust a post filter circuit, and to reduce the power consumption of a switched capacitor filter(SCF) at a main body side.
CONSTITUTION: When the outputs of a first SCF to change at 336kHz sampling are inputted from an input terminal 1, these are fetched alternately at clocks 1, 2. At the time of 1=H, capacitors 11 to 17 are charged simultaneously, and at the time of 2=H, the capacitors 39 to 45 are charged simultaneously. Since the capacitance values of these above-mentioned two groups of the capacitors are weighted by the impulse response of a non-recursive filter for primary interpolation, a 1,344MHz sample signal in the case of the primary interpolation of 336kHz sampling input can be calculated successively by adding these charges by an operational amplifier 60 at the clocks 9, 10 while taking out them successively at the clocks to 1 to 8.
| JPS61191111 | SWITCHED CAPACITOR CIRCUIT |
| JPS5871711 | CIRCUIT WITH INDUCING CHARACTERISTIC |
SHINAGAWA NORIAKI
HONMA KOICHI
| JPH01155709A | 1989-06-19 | |||
| JPH0229111A | 1990-01-31 | |||
| JPH0296417A | 1990-04-09 | |||
| JPS60245305A | 1985-12-05 | |||
| JPS61177810A | 1986-08-09 | |||
| JPS61198910A | 1986-09-03 | |||
| JPS6416010A | 1989-01-19 | |||
| JPS61198909A | 1986-09-03 | |||
| JPS6324709A | 1988-02-02 | |||
| JPH0229110A | 1990-01-31 |