H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/166, 330/20
H03K 5/00 (2006.01) H03F 3/30 (2006.01) H03F 3/347 (2006.01) H03F 3/45 (2006.01) H03G 1/00 (2006.01) H03G 3/10 (2006.01) H03K 5/24 (2006.01)
Patent
CA 1149474
ABSTRACT OF THE DISCLOSURE A signal converting circuit, which has particular appli- cation as a pedestal clamp circuit for a video signal, includes a differential amplifier having a pair of transistors which produce first and second differential currents at the respec- tive collectors thereof; a first circuit supplied with the first differential current and including a diode and a first resistor having a first resistance value connected in series between the collector of one of the transistors of the differ- ential amplifier and a reference potential; a second circuit supplied with the second differential current and including a second resistor having a second resistance value and a trans- istor having its collector emitter path connected in series with the second resistor between the collector of the other transistor of the differential amplifier and the reference potential; and an output circuit for producing an output cur- rent in response to the second differential current and includ- ing a current mirror transistor having its base-collector path connected in parallel with the collector-emitter path of the transistor of the second circuit, wherein the current gain of the signal converting circuit is controlled by the resistance values of the first and second resistors.
360458
Murakami Kyoichi
Niimura Tsutomu
Yamakoshi Akira
Gowling Lafleur Henderson Llp
Sony Corporation
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